How to troubleshoot an automotive engine high idle?

The troubleshooting procedure for high and low idle conditions are similar, which are included in the following: Step 1 – If the check engine or service engine light soon has illuminated retrieving the diagnostic trouble codes could lead you in the right direction of what the problem is, or is related too.

Can a closed EGR cause a bad idle?

Open egr would cause bad idle, closed egr will run good no matter what. 7 people found this helpful. Egr and PCV recirculate an unbelievably small amount of unburnt hydrocarbons and the only time it will affect anything is at an idle when it’s stuck open.

When to remove an idle air control valve?

Because of the nature of this valve (large air volume processed) it should be serviced when a tune up is performed to remove “coking” which will hinder the valve’s performance. To perform a rough check of the idle air control, remove the valve while reconnecting the wiring harness.

Why is my car surging at idle speed?

When an engine’s computer can “hunt” or “surge” at cruising or idle speeds it is searching for program compliance, there is a problem elsewhere in the system.

What causes idle surges on a car ECM?

Idle surging can be caused due to other issues in the car, but if it happens in conjunction with other throttle position sensor symptoms, the culprit is often the TPS. At idle, the ECM will not get the correct information and the throttle will variate randomly causing idle surges.

Can a bad throttle position sensor cause idle surging?

What are the symptoms of a bad power brake booster?

If you notice the brake pedal is difficult to push, causes the engine to stall, or takes longer to stop the car, the power brake booster is failing. 1. Hard brake pedal

Why does a hard brake pedal take longer to stop?

Along with a hard brake pedal, you may notice it takes the vehicle longer to actually stop. This is because you are not getting the actual power boost needed to properly stop the vehicle. A longer stopping distance can be hazardous in all types of weather because it can make your car unpredictable.

Why does engine stall when brake is applied at idle?

If your brake pedal is stiff and it stalls when you apply the brakes, it sounds like the diaphram in you brake booster may be ruptured. Do what Steve said and pull the vacuum line to the booster and cap it off and see if it still stalls. If it doesn’t stall, then it’s time for a new booster.

Why does my car idle when the pedal is on?

Pedal pressure 99.9% of the time almost always has something related back to the hydraulics of the system or the vacuum assist (booster). Start with the line, if you have any carb cleaner laying around, you can also soak the line with it and if there are any tiny cracks you’re not seeing, the idle will raise.

Why does my car idle at 1500 revolutions per minute?

Older cars will try to compensate for worn spark plugs or a failing ignition coil by increasing the engine idle. An engine with a problem that is idling at 1500 revolutions per minute is far more likely to stay running than the same engine trying to idle at 800 RPM.

What does it mean when your car Idles smooth?

Smooth idling indicates that your engine’s fuel and air are mixing just right. What is rough idling? If your vehicle’s idle is rough, possibly rising and falling, or having difficulty maintaining a steady rate of rotation, you may have a problem that needs fixing.

How can I keep my car at idle?

Step 3 – Engine vacuum is a sealed system and must hold a specific amount to maintain proper idle conditions, inspect the engine vacuum hoses and intake gaskets. Step 4 – The air intake boot or tube is used to deliver air to the intake system of the engine.

Why is my truck running rough at idle?

Why does my car idle rough at a stop?

You may notice your car idling roughly when it’s in “Park” or when you’re driving it and stop at a stoplight. A rough idle can be caused by damaged spark plugs or spark plug wires or a burned-out valve.

What causes a car to run rough at idle?

What Causes Rough Idle? Misfires. Misfiring is probably one of the most common causes when it comes to rough idling. Faulty Idle Control Valve. An idle control valve is often installed on older vehicles. Faulty Throttle Body or Throttle Body Sensor. Damaged Fuel Injector. Clogged Fuel Filter. Dirty Air Filter. Dirty Oxygen Sensor. Bad MAF Sensor/IAT Sensor.

What is cause rough idle?

Causes of a rough idle. Many different problems could result in a rough idle for your car or truck, including: dirty fuel injectors, clogged air filters, bad spark plugs , and a variety of exhaust system issues . Let’s go over each of these causes in more detail and learn how they can be remedied. Aug 12 2019

What does accelerated idle mean on a car?

But if the accelerated idle persists even after the engine is fully warmed up, it probably indicates a genuine problem. The first step is to determine if there are any diagnostic trouble codes stored in the PCM (powertrain control module). If there are, this will give you a good starting point for troubleshooting.

How can I check the idle air control?

To perform a rough check of the idle air control, remove the valve while reconnecting the wiring harness. While observing the valve with a flashlight, turn the key to the “ON” position, (DO NOT START ENGINE.) the valve should move slightly.

Is the idle control valve an unsolvable problem?

The intermittent problems are always difficult to suss out especially if they don’t put up a fault code. The obvious component to check from your description of the problem is the idle control valve.

Why does my GMC Safari idle all the time?

While there are a variety of reasons your GMC Safari has a rough idle, the most common 3 are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil. 34%. of the time it’s.

What causes the idle speed to go up or down?

The idle air control valve is programmed to regulate and maintain the engine idle speed at a constant rate. If the valve fails or has any issues it can cause the idle speed to be thrown off. This may result in an unusually high or low idle speed, or in some cases a surging idle speed that repeatedly climbs and falls. 2. Check Engine Light comes on

What does it mean when idle control does not increase?

If the engine idle does not increase, it means there is an issue at the idle control motor of its circuit preventing the signal from changing the idle. You can purchase a bidirectional scan tool at your local auto parts store. Make sure the wiring harness is firmly connected to the idle control motor before conducting this test.

What happens when you idle the air control valve?

Normally, if you just start your car, the idle air control valve will cause the engine rpms to increase and slowly decrease. That would be a sign that your IAC is working.

Why is the idle on my air conditioner so low?

If the idle is low and inconsistent, it may be due to an issue with your idle control valve. Low idles could also be caused by vacuum leaks. 3 Look for signs of a vacuum leak.

Why is my idle control not working on my car?

If the idle has not changed at all, it’s likely because your idle control motor has not been functioning. If the idle control motor was working, disconnecting it should have created a difference in the engine’s idle. This test confirms there’s an issue with the idle control motor, but not what the issue may be.

What happens to the idle on a Honda Accord?

So basically, it sounds like whatever type of intake system you have, it’s going to be set up to have a high idle when the engine is very cold, and the idle will slowly return to normal as the engine heats up. Not being familiar with the technical layout of Honda engines this may be a long-shot.

How can I tell if my idle control motor is working?

Look for a difference in idle speed. Allow the engine to run for a minute so it settles to a consistent idle, then take note of any difference in the idle RPMs versus the idle you observed earlier. If the idle has not changed at all, it’s likely because your idle control motor has not been functioning.

What happens to your engine at 200, 000 miles?

Common symptoms of a dirty MAF sensor include reduced fuel economy and a rough idle. Clean the MAF sensor with a cleaning product specifically designed for the task. Not every cleaning product out there is meant for MAF sensors, so read the label carefully. To reach 200,000 miles, an engine will burn 8,000-10,000 gallons of fuel.

Where can I get a replacement engine cylinder head?

AutoZone provides top-quality replacement engine cylinder heads for a variety of vehicles, including an engine cylinder head for Ford Taurus or Malibu cylinder heads, so you’re sure to find the perfect cylinder head for your specific make and model.

Can a worn cylinder head cause engine failure?

Use Code: DIYSAVE10 Online Ship-to-Home Orders Only Driving your vehicle with a properly functioning cylinder head is critical. A warped or worn head can lead to decreased power, poor fuel economy, overheating and potential engine failure.

What is the OBD2 code for a Hyundai?

OBD2 Code P0507 Hyundai definition: This P0507 Hyundai code is one that’s sometimes triggered on vehicles that have electronic throttle control. That is, they don’t have a regular throttle cable from the accelerator pedal to the engine. They rely on sensors and electronics to control the throttle.

Is the car supposed to idle fast after start up?

All modern cars are supposed to idle fast just after start up. Yours seems to be doing what it is suppposed to do, only with a bit more rpm. 2K seems a bit high, but the tach on your insturment cluster is not as accurate as a shop tach hooked up to the motor.

Why does idle speed drop during cold startup?

If the idle air control valve did not compensate for these, the idle speed would drop when certain accessories are used. In severe cases, the engine may even stall. The idle air control valve is most important on a cold startup. Problems with the idle air control will be most obvious during this time.

Is it normal to have a rough idle?

This is definitely not a normal situation. If you are experiencing a rough idle or your RPM is running high, then there are a variety of reasons for why this could be happening. It is not always easy to diagnose the cause because there are so many factors involved here. Below are the top 5 causes that a mechanic would look for.

Why does my Hilux Surf have a fault code?

Usually, troublesome EFI problems are a result of poor grounds, shorted wiring, and bad connectons at sensors.When all else fails, carefully consult your factory repair manual. It contains more comprehensive diagnostic information and great electrical wiring diagrams. Happy “Diagnosticating!”

How is the self diagnosis code read on a Toyota Hilux?

The self-diagnosis codes are read by the number of flashes of the “4WS” indicator when the terminals “TC” – “E1” of the DLC1 connector under the hood are closed and the ignition is switched on. To check, open the TC and CG terminals of the DLC 3 connector. And read the trouble codes according to the number of P / S indicator flashes.

What kind of engine does a Hilux 4×4 have?

Vehicle: 2002 Toyota Hilux D/c 4×4 3.0 KZ-D-4D. Suspencion lift,160 liter spare tank. Navigator spots. Double battery system. Tour ‘trallies’. Spare wheel carrier. Roof rack. Canopy.

When to troubleshoot a Mitsubishi 3.0L V6 engine?

The information in this article is specific to the 1989 3.0l V6 motor. Many aspects of this procedure are common to all 3.0s, but it is advisable to consult a service manual before you troubleshoot your own engine.

Where is the EFI on a Mitsubishi 3.0L V6?

If you do find it behind the glovebox, the diagnosis is made easier if you remove the side clips and let the door hang down, before manipulating the connector into position. The black (-) lead goes to the terminal indicated by black, and the red (+) lead goes to the red terminal. The gray area indicates an open spot.

What kind of fuel injection does a Mitsubishi 3.0L V6 have?

For an excellent in-depth discussion on the workings of the Fuel-Injection System in the 3.0l V6, refer to John Parkinson’s three- part series for the Mitsubishi 4WD Owner’s Club of Queensland: Pajero V6 Fuel-Injection Systems. Locked IFS bad or not ? Are All 2.6’s interchangeable?

Can a bad idle control valve cause stalling?

This is controlled by the engine’s computer. Sometimes parts go bad, which results in your car idling strangely or stalling. Check to see if your idle control valve is functioning properly before attempting to replace it. Look for a high engine idle. A common symptom of a faulty idle control valve can be a high idle.

What kind of engine does a Jaguar XJ6 have?

Models covered Jaguar XJ6 models with 3.2 litre (3239 cc), 3.6 litre (3590 cc) & 4.0 litre (3980 cc) six-cylinder in-line dohc petrol engines and automatic transmission

Where is the transmission on a Jaguar XJ6?

Transmissions are a four-speed automatic equipped with a lock-up torque converter. The transmission is mounted to the back of the engine, and power is transmitted to the fully independent rear axle through a two-piece propshaft.

What should I do about high idle surges?

P0507 – Idle Air Control System RPM Higher Than Expected. I would try doing an idle relearn first if you have this code or if you have a high or surging Idle. Works on most Nissan, Maxima, Morano, Altima, Sentra and more Idle Air, Volume Learn. 1. Make sure the accelerator pedal is fully released. 2.

Why does the Check Engine light come on when the engine is idle?

The check engine light in your vehicle is designed to turn on if the Engine Control Unit (ECU) identifies an issues with how the engine is running. Look at your dashboard; if the check engine light is on in conjunction with idle issues, it may be because the idle control valve is malfunctioning.

How can I tell if my idle control valve is working?

To check if an idle control valve is working properly, start by turning on your engine and letting it run for a minute or 2. Then, when it’s at an idling speed, take note of the RPMs in your car. Next, turn the engine off and disconnect the idle control motor under your hood.

Why is the idle speed too high on my Wrangler?

The usual cause of abnormally high idle speeds are vacuum leaks or an inoperative idle speed control motor. A vacuum leak on a fuel injected engine will cause high idle. The oxygen sensor will detect the extra oxygen that is entering the engine through the vacuum leak and will signal the computer the exhaust is lean.

Why does my car idle but no check engine light?

This issue is normally caused by low fuel pressure or a faulty injector, but since you have just replaced the fuel pump, this may also be a sign of a failing idle air control (IAC) valve. This is a unit that is located on or near your intake manifold that monitors the air intake as it is mixed with fuel prior to being injected into the engine.

How can I get my Check Engine light to go off?

One of the possible ways of getting your check engine light to go off is pulling off the engine control unit’s fuse and then putting it back again. Although this won’t solve the problem in newer cars, it may solve the problem in a little bit older cars, and it is easy to try. Check your repair manual to find the fuse to the engine control unit.

Why is my Check Engine light still on after filling up?

The cap is a crucial part of a car’s fuel delivery system. It notably prevents gasoline fumes from leaving the fuel tank, and it helps keep the whole system under the correct pressure. If your check engine light turns on immediately after a fill-up, pull over and make sure the cap isn’t loose — or still on your car’s roof.

What causes an engine to stall at idle?

If the ISC valve is gummed up with fuel varnish or dirt, it may stick, preventing the engine from maintaining the proper idle speed when the throttle closes. A faulty idle speed control circuit may also allow the engine to stall when idling if it fails to compensate for idle loads placed on the engine by the charging system or A/C compressor.

Why is idle speed not coming back up?

If the ISC system is working correctly, the PCM should adjust idle speed to keep the engine from lugging down when the A/C compressor engages. If idle speed drops down and does not come back up, the ISC system is not responding the way it should.

What kind of car has trouble holding idle until warm?

SOLVED: From Cold Start, car has trouble holding idle until warm. Why? – 1997-2001 Toyota Camry – iFixit The XV20 series of the Toyota Camry is Toyota’s 6th generation of the Camry sedan. From Cold Start, car has trouble holding idle until warm. Why?

Why does my Toyota Camry have trouble holding idle?

The XV20 series of the Toyota Camry is Toyota’s 6th generation of the Camry sedan. From Cold Start, car has trouble holding idle until warm. Why? After sitting overnight or a few days my 1999 Camry le 4 cylinder Automatic has trouble holding an idle.

Why does the engine surging stop at idle?

If I put a load on the engine by turning on the airconditioning compressor, the surging will often stop. This is an intermittent problem but seems to occur at least 50% of the time and seems to be worse after the engine has warmed up. Thank you for any input. My car has 225000 miles. My car has a manual transmission.

What to do with a high idle Ford Mustang?

This is the fix for a stuck/high/surging idle. Example: You pull up in the driveway or to a stop light with the clutch in and the car idles it self up to 2K or 3K rpms and then stays there, then finaly drops down when it wants to.

When the valve fails, it may get stuck close or open, or even leak. It is when the valve remains open when engine idle suffers. Sometimes, the engine may stall at idle because of the lean of the air-fuel mixture.

What are the symptoms of a rough idle engine?

It is possible for you to test the EGR valve at home, using a hand held vacuum pump. Other symptoms: An EGR stuck open may include a rough idle, rough performance at low engine speeds, stalling at idle, increase in fuel consumption, fuel odors, and possibly a check engine light on. 4. MAF Sensor

Why is the EGR valve open at idle?

It is when the valve remains open when engine idle suffers. Sometimes, the engine may stall at idle because of the lean of the air-fuel mixture. It is possible for you to test the EGR valve at home, using a hand held vacuum pump.

Why does my engine stall when the EGR is open?

This is because the temperature is lower so fuel does not burn at the optimal temperature and as a result is less efficient. Stalling when the engine idles like a rough idle is usually caused when the EGR valve is permanently open and is constantly letting exhaust gases into the EGR system.

Why does my Mercedes C class run rough off-idle?

21 people found this helpful. Hmmm, so what you’re saying is it idles ruff but passed that part of the test and runs smooth off-idle but fails that part because it’s running too rich ( too much fuel). If you had a vacuum leak at the throttle body you’ll be running lean not rich as you are now.

What to do if your car has rough idle?

12 people found this helpful. For rough idle problem check the fuel pressure regulator (on injection system @ front top of motor) it has a small rubber vacuum line on it, with the engine running; gently pull off the vacuum hose and hold it about 1/4 inch away from nipple.

Why is my Mercedes C class engine not working?

One Mercedes specialist told be that my cars engine is a gonner and the timing chain and gears were also damaged. Another one told us that our ECU was faulty and then suddenly there was no pressure on the one valve and so the so-called list of difference diagnosis started.

What’s the idle speed on a 1997 Nissan Hardbody?

I have a 1997 Nissan Hardbody with a 2.4-liter engine, manual transmission, A/C, and 89,000 miles. It idles at 1,500 rpm, which doesn’t go down after it’s warm. I checked all the plugs and everything seems to be plugged correctly.

What’s the idle RPM on a Nissan truck?

It idles at 1,500 rpm, which doesn’t go down after it’s warm. I checked all the plugs and everything seems to be plugged correctly. Any help would be appreciated. The first thing to do is to check for vacuum leaks. Then make sure the throttle linkage is free and moving smoothly. Also check the fast idle cam.

What’s the idle speed of a Nissan truck?

Most of them operate in a similar manner and regulate the engine’s idle speed using the same systems, so this information is useful for many car owners. I have a 1997 Nissan Hardbody with a 2.4-liter engine, manual transmission, A/C, and 89,000 miles. It idles at 1,500 rpm, which doesn’t go down after it’s warm.

What to do if your tractor stalls ( dies )?

Be sure the fuel flow lasts enough to fill up at least a quart jug. If you do not have a steady flow of fuel then you have a blockage in something before that point. Try removing the hose at the fuel filter assembly, then at the tank to find out where the obstruction is located.

What causes a JCB js130 engine to die?

We had a similar problem with a JCB JS130 and found out it was not a fuel injection problem but a problem with the hydraulic pump but we still havent got to the bottom of it. Apparently when the pump is working at full pressure for long periods of time it will kill the engine. I would be interested to find out how you get on with your machine.

Why does my Traxx idle die when trying to accelerate?

The studs are there, but a piece of the ring that the header slides into is broke off. It ran when it pulled it in the shed. The pilot that’s in it now is the one from the carb that was on it.

Why does my Daihatsu Hijet idle all the time?

If its a carb model and the idle is set correctly it could also be a clogged slow jet, fuel filter or even a failing fuel pump.

Why does my Blue Traxx die when trying to accelerate?

I’ve been fighting carb issues, had a stuck needle and was leaking fuel as fast as it went in, got that fixed and now it will start fine, idle ok but as soon as I try to give it any gas, it dies. Anyone got any ideas? I also put a used FMF pipe on it and know I need to re-jet it.

What happens if the idle level is too low?

Idle level too low. If the idle level on your (warmed up) engine is lower than the level decided by the manufactorer, you will usually have two problems: – The oil pressure inside the engine will be very low, and you may see the oil pressure lamp flicker. – Charcoal cannister in the tank ventilation line clogged by fuel or dirt.

What kind of engine does a Mercedes E320 have?

This 1995 Mercedes-Benz E320 is finished in Black (040) over Black (261) leather and powered by a 3.2-liter inline-six paired with a four-speed automatic… More 1995 Mercedes Benz E320 Cabriolet- Black with Parchment Leather, 34,200 miles,excellent condition, just replaced the engine wiring harness with a brand new (not used)…

Can a bad alternator cause a bad idle speed?

A vacuum leak in any of the hoses can be the culprit—inspect them all for leaks. A bad idle-speed control unit can cause the problem; it may need to be replaced. A faulty alternator can fast idle issues; if so, replace it. For the do-it-yourself mechanic, Many high-idle problems can be identified and remedied with some patient troubleshooting.

What’s the high idle after a carb cleaner?

High idle after throttle body cleaning throttles engine i… I cleaned my throttle body with carb cleaner about 5000 miles ago. My car used to idle at 800 rpm, but now, when the engine is cold, it idles at about 1500 rpm, going down to 800 as the engine warms up.

Why does the idle go up after cleaning the throttle body?

The idle is going to be high at first until the computer relearns the idle again. Cleaning the throttle body allowed more air to enter the engine, and the computer is compensating by adding more fuel.

Why does my car not start when idle?

Low engine compression caused by worn piston rings, cylinders and leaking valves. Faulty coolant and/or air temperature sensors gives your engine computer incorrect information resulting in improper air/fuel mixture.

What are the symptoms of a failing idle air control valve?

Symptoms of a failing idle air control valve. A faulty idle air control (IAC) valve can cause a number of problems with your vehicle: 1. Incorrect idle speed: An IAC valve that sticks in the closed position will create an idle speed that’s too low. Your RPMs will drop way down the car may feel like it’s about to stall.

What should resistance be for idle control motor?

Connect an Ohm meter to the two and measure the resistance between them. Fords are designed to operate with the resistance in the solenoid in a range between 7.0 to 13.0 ohms. If the resistance is outside that range, the idle control motor needs to be replaced.

What should the idle RPM be on a Mustang?

I found that under 1000 rpm the idle would surge wildly so I unscrewed one of the idle plates screws to raise the rpm. I cannot adjust the idle to lower than 1100 or so or the engine will surge. The surging is especially bad when the system is just at battery voltage under 1000 rpm.

Why does my Mercury Sable stall at idle?

If you experience difficulty starting the engine when cold, stalling at idle, or hesitations during acceleration, it may be the idle air bypass valve. This valve helps the vehicle idle steady when the accelerator pedal is not pressed. The average cost for a Mercury Sable General Diagnosis is between $88 -$111.

Why does my Ford Ranger stall at idle?

Problem Description. If you experience difficulty starting the engine when cold, stalling at idle, or hesitations during acceleration, it may be the idle air bypass valve. This valve helps the vehicle idle steady when the accelerator pedal is not pressed.

Why does my Ford Taurus stall at idle?

What to do if your Mercury Mountaineer starts stall idle?

I recommend a BG Induction service if you have never had this done and your vehilce is over 65,000 miles. Mercury Mountaineer 2004, AWD, V8. Bought this used with 40k miles on it. The engine dies (dead) when using the cruise control. control, several minutes pass by and suddenly the engine is dead.

What kind of problem does Mercury Mountaineer have?

Mercury Mountaineer 2004, AWD, V8. Bought this used with 40k miles on it. The engine dies (dead) when using the cruise control. control, several minutes pass by and suddenly the engine is dead. Most of the warning lights in the instrument cluster come on.

How to perform Ford idle relearn you MPT performance?

Turn the air conditioning on and allow the engine to idle for at least one minute. Release the parking brake. With your foot on the brake pedal and the A/C still on, put the vehicle in “D” (Drive) and allow the engine to idle for at least one minute. Drive the vehicle to complete the relearning process.

What does it mean when your engine idle does not increase?

Use the command in the scan tool to increase the engine’s idle. If the engine idle does not increase, it means there is an issue at the idle control motor of its circuit preventing the signal from changing the idle. You can purchase a bidirectional scan tool at your local auto parts store.

Why does my car rev up when idling?

If your car seems to be revved up to a higher-than-normal RPM while idling, it’s not necessarily a problem. If this problem happens while the engine is cold, it may be part of the engine’s design.

What are the symptoms of a bad idle control valve?

$0.00 1 Irregular idle speed One of the most common symptoms commonly associated with a problematic idle air control valve is irregular idle speed. 2 Check Engine Light comes on Another symptom of a potential issue with the idle control valve is an illuminated Check Engine Light. 3 Engine stalling

What are the symptoms of an idle air control valve?

One of the most common symptoms commonly associated with a problematic idle air control valve is irregular idle speed. The idle air control valve is programmed to regulate and maintain the engine idle speed at a constant rate.

Can a rough idle cause an engine to stall?

A rough idle will result in intense vibrations forming whenever your vehicle is stopped with the engine running. Since less air will be going into the engine during its idle state, the car will react by shaking profusely. Another more serious symptom of an issue with the (IAC) is engine stalling.

What kind of idle problem does Pajero iO have?

OXYGEN SENSOR Had simmilar Problem on my IO 1.8 GDi DOHC A/T. Extremely low idle 250-300 Rpm, Hesitation on pull off and odd Missfire when in traffic with foot on brake and poor gas milleage. Runs smooth at high RPM’s.

How do you fix idle problem in Mitsubishi?

Start by stuffing a rag down the bypass inlet (small hole just before the throttle blade), to keep the solvent out of the passage. Spray solvent into the throttle body, and let it soak, before removing the deposits with a rag.

What causes a car to have an idle problem?

This problem is almost always caused by carbon deposits which form on the air intake, throttle valve and components of the throttle body, most importantly the Idle Servo Control Motor (sometimes referred to as the ISC, IAC, or “stepper motor”).

Why is my idle speed low when the AC is on?

Problem with Low idle with A/C gone. But you should also make sure your system is not over pressurized, like noted before. Have you checked to see if your ISC is functioning properly? Click to expand… The ISC is what the ECU uses to maintain the idle speed when the AC kicks in or the power steering pump drag the idle speed down.

What should the rate of revolutions be on an idle engine?

When you start your engine, and just let it run without pressing on the accelerator or putting it into gear, that is idling. A properly idling engine should be able to maintain a steady but low rate of revolutions, somewhere in the vicinity of 1,000 RPM. Your tachometer needle should be steady and not jumping around.

What causes the Check Engine light to turn off at idle?

At idle, the ECM will not get the correct information and the throttle will variate randomly causing idle surges. The check engine light will randomly turn on and off even if the car is running smoothly without any jerks and stalling.

What is the diagnostic code for engine stall?

Diagnostic trouble codes P0120, P0121, P0122, P0123, and P0124 are what will commonly appear. The engine can stall for no reason and without any warning. This happens when the TPS gives incorrect information to the ECM. The engine can stall at high speed, at low speed, or even at idle.

What causes an engine to shut down while driving?

Step 8 – When a feedback sensor short circuits it can cause the computer to shut down, sensors most prone to failure deal with extreme heat like an oxygen or coolant sensor. There are a variety of sensors that provide feedback data for the engine management computer PCM (powertrain control module). Learn more

What causes a car to buck at high speed?

We’re not talking about a knocking engine or one that idles rough or stalls. We’re talking about engines that start easily and accelerate smoothly, but then, after a few minutes at a steady speed, either surge in speed or misfire, causing the car to “buck.”

What should I do if my engine is surging?

There may be a fault in the computerized engine control system. Check engine control systems with a scan tool. Have a mechanic test the circuits and repair or replace components as required, since this is generally not a DIY job. The fuel filter may be partially clogged. This is an easy fix! The fix: Replace the fuel filter.

What causes the RPM to go up or down?

While cruising at any given speed, I will come to a stop sign or red light or a situation that causes me to take my foot off the gas. The idle will stay at whatever the cruising idle was for about 2 seconds, then increase a couple hundred RPMs, then come down to the normal RPM.

What causes the choke out on a motorcycle?

If you are riding with the choke out (more fuel going in), and it is still dying, one of your carbs/injectors is not getting enough fuel. You could be getting back pressure (?) from a plugged pcv (positive crankcase ventilation) valve. Or the fuel may not be getting to/thru the injectors/jets.

When do you hit the brake what happens to the RPM?

When you hit the brake, hit the accelerator reasonably hard, or go off the accelerator reasonably suddenly it unlocks the converter from the engine. This produces an rpm variation of a few hundred. On many cars it is easy to see it kick on – a small drop in rpm w/out a gear change, and then see it kick off – a small rpm increase.

What causes a car to bog down at high RPM?

Engine bogs and will not go beyond a certain RPM. This is commonly caused by a deteriorated intake inlet manifold. This inlet manifold can be found connecting the carburettor to the intake side of the engine. This little elbow-shaped inlet can form dry-rotting cracks,…

What causes a rough idle on an air conditioner?

A clogged air filter will not allow clean air to pass through causing a rough idle. To remedy the situation, have your air filter replaced with a new one and also have the housing serviced to clean any dirt buildup. 7. Dirty Oxygen Sensor

What causes a rough idle when the engine is cold?

The cold-start injector is in charge of smoothing out a rough idle when the engine is operating at a temperature that is below optimal levels. One the engine reaches the right temperature, the cold-start injector turns off. If the injector is dirty or you are dealing with a bad fuel injector, it will not give the extra fuel needed.

Is the EGR valve supposed to run during idle?

However, this EGR valve isn’t supposed to operate during idle, at wide open throttle or before the engine is warmed up. If it runs at any of these times, the performance of the engine is affected.

Why does my car idle all the time?

Car idles can happen due to various reasons, like carburetor issues, vacuum problems, poor valve seals, and many other reasons. We can help you narrow it down to the real cause and help you repair and fix the parts.

When did the Kawasaki MULE 2520 come out?

In 1993, sales of the MULE™ 2520 utility vehicle, the second in the MULE 2500 series, began. The combination of a quiet-running liquid-cooled V-Twin engine with a sound-insulated engine box and turf tires made it possible to handle the toughest jobs with a quiet and light “footprint.”

When did the Kawasaki MULE 610 come out?

In 2005, sales of the MULE™ 610 4×4 and 600 commenced. The new “baby” MULEs featured new 401cc engines, more rugged suspension, new high-volume bodywork and a number of other features designed to increase their comfort and convenience. The 610 4×4 also featured selectable 2WD/4WD—a class first—and large 24” tires.

What’s the problem with my Kawasaki MULE idle?

A little off topic but i have a problem with my mule. (3010) Does anyone have a fix to make a mule idle? you have to keep your foot on the gas all the time. It starts great and runs good. I have screwed throttle adjusment screw all they way in. any help would be appreciated. thanks randy

What to do when your car is at high idle?

While observing the valve with a flashlight, turn the key to the “ON” position, (DO NOT START ENGINE.) the valve should move slightly. Step 3 – Engine vacuum is a sealed system and must hold a specific amount to maintain proper idle conditions, inspect the engine vacuum hoses and intake gaskets.

What’s the difference between high idle and low idle?

Step by step automotive repair guide on how to troubleshoot and fix an engine that is idling high (fast) or low (slow). (Note: The engine idle speed is controlled by the computer and is NOT adjustable.)

How to adjust the carburetor on a Kawasaki MULE?

Take off the metal cover and set it aside in a safe location. Locate the idle adjust screw, or accelerator stop screw on the side of the carburetor that is above the top of the rear axle of the vehicle. Loosen the idle adjust screw by moving it a 1/4 turn, counter-clockwise. Start the engine and see if it runs smoother.

Can a clogged fuel filter cause an engine to hesitate?

Note that a clogged fuel filter has the ability to cause an engine to hesitate or stumble during acceleration. Anytime that your car exhaust emits strong fumes, this could be a symptom of a dirty fuel filter. And also, it could mean other damaging issues are at play, as well.

What happens if you don’t change your fuel filter?

WHAT HAPPENS IF YOU DON T CHANGE YOUR FUEL FILTER 1 Your engine will not perform well: anytime your fuel filter gets clogged, it has the ability to reduce the flow and… 2 Your vehicle’s parts might damage: note that because of its abrasive action, dirt and contaminants in the fuel can speed… More

How can I increase idle speed in a Chrysler?

If the resistance is outside that range, the idle control motor needs to be replaced. Use a bidirectional scan tool to increase idle speed in a Chrysler. Connect a bidirectional scan tool to the same OBD port you would plug a code scanner into. Use the command in the scan tool to increase the engine’s idle.

Is the warrior Idles fine when trying to accelerate?

The warrior idles fine. I’ve adjusted to air mix screw back and forth. It changes the idol but doesn’t seem to improve things when I try to rev it up. 2.25 turns seems to be the sweet spot, as far as idol. The needle is where zoom put it.

What to do if your bike Idles when trying to accelerate?

Clean the carb,run some sea foam through it,if that doesn’t work,try your timing.if all else fails it could be a sticky valve and or a bent valve ( I ran a bike on a bent valve for 2 months before it blew) How do you check the valves. I’m not a mechanic but I can do the small stuff. Lol I have a 89 warrior. I put it in the shed during deer season.

What causes a motorcycle to stall at idle?

Extremely lean motors can also stall out completely when given some light throttle. Another sign of lean running is the “hunting idle” where the motorcycle revs up randomly, changes RPMs, or takes forever to come down to idle.

How can you tell if your bike throttle cable is going bad?

The throttle cable normally lets you know it’s going bad by refusing to snap back the throttle grip when it is turned and released. Never ride such a bike – they call that a “suicide throttle” for a reason.

What are the most common problems on a Harley Davidson?

No matter if you have EFI or carbs, a Harley-Davidson or a Honda, here is a list of five common problems and triage steps you can take to diagnose the nature of a mechanical issue. Even if you can’t fix it, you don’t have to blindly trust your hard-earned cash to the honesty of the nearest “reputable” mechanic.

Why is the RPM on my Harley Davidson so high?

(Could be you went through 50 key cycles with no engine issues) When you get off the interstate & the idle is high,,, if you were to power it off and restart the bike, does the idle calm down or does it resume the high idle. Would help to know how high the RPM was, but you have no tach. (?)

When does idle come back to normal on a Harley Davidson?

Just seems to happen when I’ve been running at a fairly wide open throttle maintaining higher speeds for a while (fwy) or longer stints (catching all green lights) on the streets at a speed of about 45 or more. It always seems to come back to a normal idle after getting back into first gear when stopped, or when I start going again in 1st.

What does idle mean on a Harley Davidson?

I get off the off ramp, down shifting like I normally do to a stop and the idle in 1st gear at stop stays very high, as if the throttle is stuck. I don’t really know how to describe it other than that. I think I first noticed it when riding down a big hill with my HOG group.

Why does my ECM say idle all the time?

This allows the ECM to remember all the “idle”, throttle position and store the DTC status. There was also a download update if memory serves for some of the 2007 or 2008 models regarding an idle issue, so check with your H-D dealer for Service Bulletin regarding this.

What happens when you leave your car idling?

Leaving your car idling will waste not only gas but does not allow your battery to charge. Not allowing your battery to charge will drain its power during idling. During idling, your engine and alternator run slowly. The alternator will provide electricity to charge the battery.

What should you do if your car idles for a long time?

How your engine idles is a good indicator it its overall health; addressing the problem sooner rather than later and checking all potential causes is important. If you’re unsure what the problem is, it is always a good idea to call in the professionals for a diagnosis.

What are the symptoms of lean idle on a motorcycle?

Spark plugs are clean – No residue. Insulator may be white. Runs better at higher altitudes – AFR becomes normalized due to reduced atmospheric pressure allowing fuel into the venturi easier. Backfires – Popping on deceleration for a lean idle circuit or backfires in general.

What causes engine to run hot on lean idle circuit?

Backfires – Popping on deceleration for a lean idle circuit or backfires in general. Runs on choke – The vehicle may run on choke when it’s warm but stalls if the choke is turned off. Engine runs hot – Due to more oxygen than fuel combustion temperatures are hotter reflecting on a temp gauge.

Can a Stihl ms170 idle but not run high?

I can make the saw either run well at high rev but it will not idle or run at low rev. THis is accomplished by having all diaphragms set correctly. If i swap the gasket and diaphragm on the pump side it will idle and run mid range but dies at high rev.

Why is the idle speed of my car so high?

Step 2 – The idle air control motor (valve) is responsible for controlling the engine idle speed, if this part fails or becomes weak the engine idle speed could become erratic, additionally, this condition may or may not trigger the MIL (check engine, service engine soon light.)

What should the idle RPM be on a car?

Your engine should normally get to around 700 RPM after you start the vehicle, depending on the model. If your idle is way off and you have one or more of the problems listed above, then you will want to diagnose the issue right away.

Why does my outboard motor run at high speed but not idle?

When an outboard motor runs at speed but cannot hold an idle, it usually indicates a problem with the carburetor. Outboard motor designs vary depending on make and model, but all operate on similar principles. Consult your owner’s manual to check items that may be unique to your motor.

What happens when Coil on plug ignition system ( cop ) fails?

A failing coil may cause the engine to backfire (loud pop from the engine) during sudden acceleration. (COP) ignition problems can include many of the same ailments; as other ignition systems such as misfiring, hard starting or a no start. So (COP) ignition systems are not immune to trouble.

Where is the coil on plug ignition system?

The most sophisticated of all ignition systems. The Coil On Plug Ignition System places an ignition coil; directly on the top of each spark plug. As a result, the Coil On Plug Ignition System; eliminates the need for distributors and spark plug wires.

What happens when a spark plug goes bad?

If your ignition coils or spark plug wires have gone bad, you will experience similar symptoms to having bad spark plugs. Ignition coils, coil packs, and spark plug wires transmit a very high voltage to the spark plug which enables electricity to jump the gap.

What causes the engine rpm to go up when idle?

When the engine idles, there will usually be a misfire that you can feel just from holding onto the steering wheel. Furthermore, the RPM of your engine will be higher than normal when the vehicle is idling. The RPM will usually go back to normal as you accelerate the vehicle, but will increase again after you stop.

Why are my spark plugs snapping in half?

Now, they had begun experiencing problems during the replacement of the spark plugs. The spark plugs were so secure and so snug in their housings that upon attempting removal, the spark plug would often snap in half. In the worst case scenario, spark plug fragments (parts of metal or ceramic) could end up in the cylinder.

Why does my Dell laptop battery say idle?

When I checked BIOS, it said that the battery is ‘Idle’. I doubt this is a battery problem, since it seems to be charging normally… from reading these posts, it seems like BIOS is the problem to me.

Why is my Inspiron 8600 battery status idle?

Battery status idle Problem developed suddenly on Inspiron 8600. Battery stopped charging and is displaying status idle. Just received a new battery today with same results. The laptop can detect battery type but is not allowing charge. Tried neighbor’s AC supply with same results. Battery works fine there too. Any leads. Jac 0 Kudos

Do you have to relearn idle when a battery is replaced?

If the engine threatens to stall or idles too high, stepping on the gas slightly or taking the car for a short drive will help set the PCM correctly. But with some PCMs, the relearning procedure is not noticeable. Engine idle is only part of the natural memory, or accumulated data, lost when the battery is replaced.

Can a dirty idle circuit not accelerate under load?

A dirty idle circuit can idle fine and rev like crazy, but bog and die as soon as the throttle is opened while under load. Re: Motor will not accelerate under load. My 150 mercury was doing the same thing and it was the switch box not spark on 3 cyclinders, so for sure check the spark.

What makes the RPM drop at low idle?

Check the timing both in and out of gear. If the timing is falling way back in gear, that’s most of your problem. Usual culprit is a centrifugal and/or vacuum advance kicking in at idle. As soon as you throw it in gear it drops back, making the RPM drop worse than it would ordinarily be. Also check for vacuum leaks.

What should the idle speed be in neutral?

In Park or Neutral it idles up at 1500. But when I drop it into drive it goes all the way down to around 600. This seems like an excessive drop to me. I had to set the curb idle high so that when it went into gear it wouldn’t stall out.

What does it mean when your car Idles faster than normal?

Engine is idling higher than normal. If there is no RPM gauge but the engine sounds like it is turning faster when idle, a mechanic can use an instrument to measure the actual engine speed. Harsh engagement in drive. If the idle speed is too high, the vehicle will jump forward when placed in drive.

What are the downsides of a rough idle?

The downsides of a rough idle can be reduced fuel economy, poor performance, starting issues, or potential major engine problems in the near future. It is best to try to diagnose and fix a rough idle before it gets worse and before it gets expensive! What Is idling? Let’s start with a definition of idling.

Why is my Nissan Navara D40 YD engine stalling?

An expert that got 10 achievements. Re: My Nissan navara d40 yd engine diesel is stalling at… You can’t post conmments that contain an email address. 07 nissan quest side door won’t pull open. The metal wire that I guess pulls it in just hangs down from the side when I manually open the side door.

Is there a cookie policy for Nissan Pulsar?

By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. nissan pulsar: N 15 pulsar 1.6 ltr wont start turns over plenty… N 15 pulsar 1.6 ltr…

Why does my N 15 pulsar not start?

N 15 pulsar 1.6 ltr… Hi, welcome to just answers,are you sure you have both, have you try replasing fuel with choke cleaner or starting fuel sprayed in to the intake? this will eliminate posible fuel injector sygnal problems . if it starts then you have either fuel pressure or fuel injector signal problem.

What kind of engine does a Nissan truck have?

The small engine in this truck is similar to many other engines in Nissans and other makes. Most of them operate in a similar manner and regulate the engine’s idle speed using the same systems, so this information is useful for many car owners. I have a 1997 Nissan Hardbody with a 2.4-liter engine, manual transmission, A/C, and 89,000 miles.

How do you fix a high idle on a Nissan truck?

If necessary, adjust the fast idle cam screw (A) until the alignment mark is centered on the lever roller. Start the engine and let it warm to operating temperature, or do the repair after a few errands that you needed to run anyway. Measure the clearance between the lever roller and the top of the fast idle cam using a feeler gauge.

Why does my car stall at low rpm?

The will likely force your computer to stall the engine and only allow it to run at low RPMs, which means the car will only move at slow speeds. This is a safety feature enforced by the computer so that your engine doesn’t get too damaged.

What causes the idle control system malfunction code?

All our repairs are backed by our 12-month / 12,000-mile warranty. P0505 is an OBD-II generic code that the engine control module (ECM) determined the engine idle control system is not managing the idle to stay in specification. The idle is too high or goes too low. What causes the P0505 code?

What does the idle control system code p0505 mean?

Idle Control System Malfunction What the P0505 code means P0505 is an OBD-II generic code that the engine control module (ECM) determined the engine idle control system is not managing the idle to stay in specification. The idle is too high or goes too low.

Why does the Nissan Maxima have a high idle?

Share it! The throttle body for the Nissan Maxima is known for carbon buildup, and requires regular, light cleaning to maintain peak performance. After cleaning the throttle body, many owners notice a very high idle, erratic (bouncing) idle, and unpredictable power surging.

How much does a Nissan Maxima check engine light cost?

The average cost for a Nissan Maxima Check Engine Light Diagnosis & Testing is between $88 -$111. Learn More Idle bounces up and down, parts replaced, throttle body, mas air flow and mass air plug or connector harness and no change.

Which is worse rough idle or perfect idle?

Very rough idle with a repetitive cycle that is smooth for a couple of seconds then misses badly, occasionally stalling. Worse problem is bad hesitation when accelerating after throttle at idle position, sometimes stalling. Worst after stationary idle, but also after moving at low to medium speed with closed throttle and then accelerating.

Is the drivig engine smooth at low idle?

So smooth you could balance a coin on the engine even at low idle revs of around 650 rpm. In fact drivig with the TPS disconnected is quite acceptable, except that automatic gear change down does not happen (as expected). Have had the car for approx 13 years and has been a great, reliable family car.

What causes engine revs to drop when idle?

3) Once at normal operating temperature, the engine misses badly while idling. It idles smoothly for a second or two, then misses, which causes the revs to drop suddenly, and then the control system seems to increase the idle speed to counteract the drop in revs for a second, and then the cyle repeats.

What’s the idle speed on a 1991 Chevy?

The idle speed on a 1991 Chevrolet refers to the RPM of the engine when the transmission is in drive, and the engine is running, like at a stop light. Sometimes, the idle speed drops too low, and the engine could stall while you’re stopped. Other times, the idle speed could be too high, causing the engine to spend more gas than usual.

When does the Idle Control System Trigger p0507?

The standard RPM per vehicle varies depending on make and model, but most engines should ideally run between 600 and 800 RPM while idling. For example, some GM vehicles will trigger code P0507 if the engine computer clocks an idle speed that is 200 RPM above the recommended range.

How to clear a service engine light error code?

To clear any trouble codes, disconnect the power feed for 30 seconds. If this is done at the battery, and your car stereo is equipped and programmed with a four digit pin code, you may have to re-enter that as well to use your stereo again. A better place to remove power is at the fuse. 12. No reference pulses to Electronic Control Module (ECM).

Why does my car idle when out of time?

An engine slightly out of time can idle roughly since the spark is not in sync with the cylinders. Too much timing advance or retardation causes serious drivability problems. Many problems may upset timing. However, the most common is an overstretched timing belt or chain, or a bad tensioner after miles of operation.

What does the idle control system code mean?

The role of the Idle Control System is to manage the engine’s idle speed and meet the fluctuating load placed on the vehicle’s engine, which varies from the use of air-conditioning, heater, wiper, etc. Error Code P0507 means the idle speed is faster than normal. This code is sometimes triggered on vehicles with electronic throttle control.

When does high idle at startup Stay High?

High Idle: High Idle at Startup No Codes Stays High, When I Push have the same problem? Have you checked for vacuum leaks? helpful? helpful? How did you check for them?Also have you checked the coolant temp sensor?

What should the idle speed be on a motorcycle?

And you will usually not be able to adjust the idle level in any way. Usually we see the idle speed being between 1000 and 1300 RPM (engine revolutions per minute) when the engine is at operating temperature, and often as bit higher during warm up.

What to do when idle is not coming down?

We’re not fast racers, we’re more what’s known as half fast racers. If you have no vacuum leaks, It sounds like your secondaries are open. Then turn the secondary stop out until the idle starts to come down to the desired level. Then fine tune the idle with the primary. You may need to reset the idle mixture screws and repeat the process.

What do you use to adjust idle speed?

What I’m trying to adjust the idle with is the curb idle adjusting screw: The Holley tuning video says “the curb idle adjusting screw sets the idle speed by opening and closing the primary throttle plate”. I did not adjust any screws that are internal to the carb, and in fact have not had the carb removed.

Can you get your idle speed below 1400?

I can’t get my idle speed below 1400! I don’t mean that the car won’t keep running with the idle set lower, what I mean is even with the idle speed adjustment screw backed all the way out till it’s not even touching the linkage the idle doesn’t go any slower. The car is running fine other than that problem.

When does an idle air control valve malfunction?

As soon as you start your car, the idle air control valve will immediately malfunction. If you happen to be away from home and this happens, the stalling will happen every couple of minutes in the beginning. You should be able to make it to the nearest mechanic in time before the engine stalls completely.

Why does my Ford Mustang idle at 800 rpm?

The car had underdrives on the crank and waterpump before I bought it and the volt gauge does not go up until about 1000 rpm. Even with this the car would idle before at 800 rpm. When I added the parts in the sig, the engine would not idle at all. The car died every time it came to a stop.

What should my idle AFR be on my car?

-I should note that the car is running extremely lean regardless of the pressure of fuel going in according to my wideband. It is reading 18-20 AFR at idle . Should be 14.7 like it was before, I haven’t changed any tuning with HP Tuners and I know that my injector constant is correct.

Why is my quad 4 engine so bad?

The coil housing itself contains copper (thin) runners to carry the high voltage spark from the coils to the plugs. My housing was bad because the copper strips had hairline cracks I could see with the naked eye when I busted it open. These cracks acted exactly like bad plug wires. The engine would miss hot or under load.

Why does my car run at twice normal idle speed?

This leans out the fuel mixture which raises the engine speed. The change could be as noticeable as twice the normal engine idle speed. With fuel injection vehicles, if the air bypass adjustment screw refuses to change the idle speed, it means air has entered the throttle body, also leaning the mixture and raising the rpm.

How is the idle speed of a car controlled?

Hello, the idle speed on your car is controlled by the computer through the throttle body motor assembly. Depending on what the desired idle speed is the computer will move the throttle plate until the engine reaches the desired RPM.

What should idle and revving be on a Pontiac Grand Am?

Measure the distance that the valve is extended before installing a new valve. The distance from the idle air control valve motor housing to the end of the idle air control valve pintle should be less than 28 mm (1-1/8 in). Manually compress the pintle until the extension is less than 28 mm (1-1/8 in).

What to do about high idle and revving?

If it happens at idle in park, block off the mouth of the throttle body, see if any effect on the idle, should be a big effect. If no effect, you have false air getting in there from somewhere. If everything checks out it sounds like the PCM is going bad. This guide can help us fix it.

Why does my Grand Am engine rev high?

I have a 2003 Pontiac Grand Am 3.4 liter. Sometimes the engine starts revving high uncontrollably. It doesn’t happen all the time, but when it does happen, it does it sometimes when I start the car, or when i’m driving down the road, or when i’m sitting at a stop light.

If the valve fails or has any issues it can cause the idle speed to be thrown off. This may result in an unusually high or low idle speed, or in some cases a surging idle speed that repeatedly climbs and falls. 2. Check Engine Light comes on

1 Irregular idle speed One of the most common symptoms commonly associated with a problematic idle air control valve is irregular idle speed. 2 Check Engine Light comes on Another symptom of a potential issue with the idle control valve is an illuminated Check Engine Light. 3 Engine stalling

Why does my car idle at 1500 all the time?

Quick tests If your idle stays at 1500 all the time, most likely it is the electronic idle speed regulation. (If you want to simulate this in a properly working car, just yank the idle speed controller plug off.) Jiggle the connectors to the slide valve and the controller box.

What should the idle speed be on a Mercedes Benz?

Normal idle, warmed up, should be right around 500 rpm. It should stay there very solidly.

What is the problem with the idle air control valve?

The problem may involve an annoying change (up/down) of engine speed while cruising at a steady pace, a low drop (or even cut-out) at idle or when approaching a stop, a wild high engine speed of several thousand rpm followed by a drop to near zero, etc. • Dirty/sticking IAC (idle air control valve) (P0505)

What’s the low idle on a Toyota 4Runner?

My High Idle CURED!!! Ok people, so after many months of frustration and pulling my hair out, I finally got to the bottom of my high idle problem. Just to recap, my rig would idle at 1700 ish even after it was up to temperature.

What causes a rough idle or a ses?

A Rough Idle or a SES can sometimes be caused by a change in the throttle body position sensor calibration. To correct any accidental changes in throttle body calibration, use these procedures to recalibrate. Note: These procedures are a little tricky to do. You must get the timing just right Use a stop watch to help the precision of your timing.

Is there a way to reset the throttle body?

This method is almost foolproof as long as all ECU control parameters are within their normal ranges. Resetting The Throttle Body Calibration (this step is conditional) A Rough Idle or a SES can sometimes be caused by a change in the throttle body position sensor calibration.

Is it normal to get 12.1inhg at idle?

Getting 12.1inHg at idle in drive, 29.2inHg at WOT. Normal? I need to find out if this is feeding my PCM correct information – I’m being told that it may be faulty, leading to my spark knock situation.

What kind of engine does a Peterbilt 379 have?

Discussion in ‘ Trucks [ Eighteen Wheelers ] ‘ started by PacManTrap, Mar 30, 2016 . I have a 2001 Peterbilt 379 with a cat c-12 engine.

Why does my automatic transmission truck wont go in?

Empty it out and squeeze the plastic sides in and it will drop. Then you will see the fuse panel. Never liked them Automatic Transmission at all. It may save some people fuel. To much Electronics in everthing now a days.

Why is my idle on my 65 Mustang?

The owner of the 65 mustang also had a 1406, but his idle goes down after warming up, my idle doesn’t even do that. It remains high no matter way I do…. At this point in time it doesn’t hurt to give it a shot though. Make sure you do not have a busted diaphram inside the brake booster. This could cause a high idle also.

Can a bad coolant temp cause high idle?

Also did you check the coolant temp sensor?They can go bad not set a code and cause a high idle. helpful? I did check the coolant temp sensor it’s ok also injected smoke the only place it came out was the egr so I replaced that still the same?

Is it safe to drive in 4WD mode?

Originally 4WD vehicles were designed to stop the wheels from spinning on dry surfaces due to them carrying heavy loads. Regardless of your driving experience with any vehicle under any weather condition, it is better to be safe than sorry and slow down in dangerous areas. Can you shift to 4WD mode while you’re in transit?

When to use 4H mode on a car?

This mode is normally engaged when the vehicle is driving on highways that are wet or have snow or ice on the track. 4H is also effective at achieving normal speeds on roads that are made from loose-gravel, mud, or sand. To summarise this mode, it is for achieving normal speeds on your vehicle while also needing more traction on the road.

How many miles does a Volvo V40 run?

First post after the introduction one. Have not used the V40 a great deal since getting it, but today we had a run up to Stirling then along to Callander and from there home, 143 miles. It was a nice sunny afternoon and the car ran well until about 3 miles from home.

What should you do if your car overheats while idling?

If your vehicle only overheats while idling, you should double-check that the fan is working correctly. The fan pushes air over the radiator to keep it cool, which is especially important while your vehicle is idling. RELATED: 7 Causes Why Your Radiator Fan Is Not Coming On 5.

Can a low coolant level cause an engine to overheat?

Low Coolant level. A low coolant level will in most cases cause an overheating engine. However, if the coolant has gone low, you do most likely have an internal or external coolant leak on your engine.

What causes a car engine to overheat in a house?

If it’s stuck open or closed, your engine will overheat, which is a significant problem. The thermostat is usually located in a plastic house somewhere on your engine block or head, check your repair manual to find its location. 3. Broken Water Pump Your vehicle’s water pump pushes the coolant throughout the engine.

What does it mean when your car is idling but not running?

When the engine is running but the vehicle is not moving, this means the engine is idling. During this time, the number of revolutions per minute (RPM) inside the engine will change.

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