When is a bad throttle position sensor a warning sign?

Engine won’t idle smoothly, idles too slowly, or stalls If you start to experience engine misfires, stalling, or rough idling when the car is stopped, it can also be a warning sign of a failing TPS. You don’t want to wait to get this checked out!

What happens when the throttle gets stuck in an open position?

When the throttle gets stuck in an open position than your vehicle will receive too much air and cause it to have a high or fluctuating idle. What are signs of a bad Throttle Position Sensor? Acceleration issues: A bad TPS may cause all sorts of power issues. Your engine may start up but it will have little to no power and it causes it to shut off.

What are the signs of a failing throttle body?

Here are 5 signs of a failing throttle body: Dirt and grime can build up inside the housing, this being known as coking, and causing an interruption in air-fuel flow.

What should the voltage be for wide open throttle?

If the voltage you get is not within spec, loosen the TPS retaining screws and adjust as necessary. Normal voltage reading for wide open throttle (WOT) is above 4.00 volts. There are trouble codes that are associated with the TPS. One code will set if the TPS voltage is too high when the computer expects to see it lower.

What does OBD I diagnostic code 88-95 mean?

Full list of OBD I Diagnostic Trouble Codes for your ’88 – ’95 Chrysler. If your Check engine light is on you may have a serious problem. Scan your codes and follow the chart to determine what the code means. Some shops will scan your codes for free.

Where is the trouble code on an Oldsmobile?

When retrieving Oldsmobile trouble codes with an OBD II scan tool, proceed as follows: 1. Connect scan tool to the 16-pin data link connector (DLC) located underneath the steering column. The connector may have a removable cover. 2. Turn the ignition on. 3.

What is the diagnostic code for bad throttle position sensor?

Using a code reader, you should be able to confirm whether a faulty TPS is the culprit or a different component. 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.

How does the GM 3.8L throttle position sensor work?

The throttle position sensor’s job is to measure the angle of the throttle. So here, in a nutshell, is how the throttle position sensor works when you crank and start your 3.8L GM V6 equipped vehicle: The fuel injection computer supplies 5 Volts and Ground to the throttle position sensor.

Can you bypass the pass lock system on a Chevy Silverado?

You can bypass the security system completely and never worry about the problem again. You will not have a security system in your vehicle once it is bypassed. To reset the pass lock system Make sure your battery is fully charged as your key will be on for 30 to 45 minutes while you are resetting the passlock system.

Where does the coolant go when the engine is turned off?

When a vehicle overheats, or after the engine has been turned off after a long ride, an expansion valve opens inside the radiator cap to allow pressurized coolant to enter the overflow reservoir.

How is the throttle connected to the accelerator?

In the old days, there used to be a cable that was connected from the throttle to the accelerator. But now in the technological age, the car’s computer controls when the throttle opens and closes by the feedback it gets about the acceleration of the vehicle.

What does the throttle position sensor ( TPS ) do?

The throttle position sensor (TPS) is part of your vehicle’s fuel management system and helps ensure that the correct mixture of air and fuel is delivered to your engine. The TPS provides the most direct signal to the fuel injection system of what power demands are being made by the engine. The TPS signal is continually measured…

What does it mean when your car throttles up while driving?

In these cases, the TPS isn’t providing the right input, the onboard computer cannot direct the engine to work properly. When the car accelerates while driving, it usually means the butterfly valve inside the throttle has closed up and pops open suddenly when the driver presses on the accelerator.

What are the symptoms of a bad throttle position sensor?

This is another failure mode of the TPS, which indicates that it is falsely limiting the power being requested with your accelerator pedal foot. You may find that your car will accelerate, but not beyond a speed of 20 – 30 MPH. This symptom often goes hand in hand with loss-of-power behavior.

How to diagnose Honda throttle position sensor p0122?

Start by checking the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins. The cost to diagnose the P0122 HONDA code is 1.0 hour of labor.

How does the throttle pedal position ( TPP ) work?

The Throttle Pedal Position (TPP) responds to the accelerator pedal movement. This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the Engine Control Module ( ECM ).

How does a throttle sensor work on a car?

This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the Engine Control Module ( ECM ). In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the ECM.

What causes an electronic throttle control light to come on?

The most common causes of an electronic throttle control light are a faulty throttle control sensor or a faulty throttle accelerator pedal position sensor. But while those are the most common causes of an electronic throttle light, they aren’t the only things that could be going on.

How does the throttle position sensor work in a car?

A throttle position sensor is similar to the motor cortex in the human brain, it controls one of the most important components of the car that keeps your engine running like a throttle body. Picture a little module in the car that reads how far down you have pressed the gas pedal.

What happens when throttle body goes out of control?

While you might be lucky and only have a drop in fuel efficiency or a slight drop in acceleration, the problem can quickly get worse if the sensor readings continue to go awry. The throttle body controls how much air enters the engine, and if your vehicle’s ECM can’t keep accurate tabs on this, then it can quickly lead to an out-of-control engine.

Can a bad throttle position sensor cause stalling?

Similarly, if your engine struggles to idle efficiently, it could also be a result of a damaged throttle position sensor. Stalling, surging, or hesitating while idling all can be caused by this unassuming sensor. The best way to determine if these issues are caused by your throttle position sensor is to go to the source.

Can a normal throttle go below idle speed?

A normal throttle will not do this – if you watch your tachometer as you slow down, your engine speed will almost never go significantly below idle speed.

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.

What does it mean when your car’s throttle is failing?

When the throttle actually starts “failing,” you’ll feel a significant jerking motion as the engine tries to stall, often at highway speeds. Stepping on the accelerator pedal will, momentarily, do nothing. This can be quite unnerving to the uninitiated driver, or for passengers.

What causes the throttle control light to go on?

The engine computer is programmed to go into limp mode when the system malfunctions, in an attempt to limit your speed and prevent damage to the engine. It can be caused by a sensor failure, or even by outside electromagnetic interference. Your mechanic can diagnose and fix the problem. Can I drive with the throttle control light on?

Why does my throttle control go into limp mode?

Solution: This indicates a serious failure of your throttle control system. The engine computer is programmed to go into limp mode when the system malfunctions, in an attempt to limit your speed and prevent damage to the engine. It can be caused by a sensor failure, or even by outside electromagnetic interference.

When does the Check Engine light come on?

The Check Engine Light may come on if you’re having issues with your TPS. This isn’t always the case though, so don’t wait for the Check Engine Light to illuminate before you get any of the above symptoms checked out. Have your vehicle checked for trouble codes to verify the source of the problem.

How is the TPS signal used in the engine?

The TPS signal is continually measured and combined many times per second with other data such as air temperature, engine RPM, air mass flow, and how quickly the throttle position changes. The collected data determines precisely how much fuel to inject into the engine at any given moment.

Which is the third signal in the audio test?

Pink Noise. The third signal pink.mp3 contains noise. This ‘Pink’ noise has a particular characteristic (equal power per octave, power density decreases 3dB per octave) that makes all frequencies in the noise equally audible and therefore the pink noise can reveal very small frequency response differences effectively.

What to do when your turn signal is not working?

Step 2 – Locate the power distribution center (PDC) or fuse panel to check all system fuses. Learn more – To locate the fuse consult the owner’s manual or search Google Images. Step 3 – When a turn signal flasher or relay fails the blinkers will not operate or come “ON”, but not blink.

What happens when a turn signal Flasher fails?

Step 3 – When a turn signal flasher or relay fails the blinkers will not operate or come “ON”, but not blink. A direction signal system is designed to operate with a flasher or blinker unit which interrupts the signal which created the blinking action. Learn more-Locate turn signal flasher in Google Images.

How is a turn signal used in a car?

A turn signal switch is used to operate the direction signal system in a vehicle, which helps communicate an intended direction. Some lighting system designs integrate the turn signal and brake light systems which share the same circuit. Most lighting systems are grounded near the light bulb, which will produce a single bulb operation failure.

Why is my blinker not working on my Turn signal?

A direction signal system is designed to operate with a flasher or blinker unit which interrupts the signal which created the blinking action. Learn more – Locate turn signal flasher in Google Images. Step 4 – When a turn signal switch fails the system will short or go “open” causing the blinker not to operate.

When do the VSC off and check engine lights come on?

“VSC Off” and “VSC TRAC” lights will often come on when an error code triggers the Check Engine light. It doesn’t necessarily mean there is an issue with those systems. If they all showed up at the same time, it’s likely that diagnosing the cause for the Check Engine light will fix them all.

What is the code for the Check Engine light?

The C1201 code is the one that tells the vehicle to turn on the check engine light and disable the traction and VSC. Basically, when the other two codes pop up, this one is in charge of letting you know there’s a problem.

Can a bad crankshaft sensor cause the engine to stall?

If the crankshaft position sensor or its wiring have any issues, it can cause the crankshaft signal to be cut off while the engine is running, which can cause the engine to stall. This is usually a symptom of a wiring problem, however a bad crankshaft position sensor can also produce this symptom.

How to learn the release position of the accelerator pedal?

Accelerator Pedal Release Position Learning Procedure. Make sure that the accelerator pedal is fully released. Turn ignition switch “ON” and wait at least 2 seconds. Turn ignition switch “OFF” wait at least 10 seconds. Turn ignition switch “ON” and wait at least 2 seconds.

What are the symptoms of a bad accelerator pedal?

Symptoms of a Bad or Failing Throttle/Accelerator Pedal Position Sensor. Common signs of a faulty pedal position sensor include inconsistent engine response, reduced fuel efficiency, and the Check Engine Light coming on. The days of having to constantly adjust the throttle cable due to a loose nut on the carburetor are long gone.

Why does my Nissan Frontier hesitate during acceleration?

If you notice some symptoms like hesitation, you should have your vehicle inspected immediately. Mass Airflow Sensor: The mass airflow sensor measures how much air is entering the engine and relays this information to the vehicle’s computer so that the right amount of fuel can be delivered from the fuel injectors.

What happens when the throttle control warning light comes on?

There can be many different causes for the throttle control warning light, so a proper diagnosis is key. When the warning light comes on, there’s a possibility you either won’t be able to accelerate or you won’t be able to stop accelerating. Either of these situations could be extremely hazardous to you and your passengers.

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.

Why does my Toyota Tacoma hesitate to accelerate?

If this mixture is thrown off in any way, it may result in an engine running too lean (not enough air), or too rich (not enough fuel). An engine that is hesitating to accelerate is most likely dealing with a fuel/air mixture that is too lean.

How can I tell if my fuel filter is dirty?

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. Anything you think that could be the case, note that a foul odors mean you should have a professional to examine it immediately.

Can a clogged fuel filter cause insufficient fuel supply?

Although a clogged or immensely dirty fuel filter can cause insufficient fuel supply from reaching the car’s engine. It is known that the injector influences how much fuel the engine consumes.

What are the symptoms of a bad fuel filter?

As is the case with most automotive filters, over time the fuel filter can become excessively dirty — to the point where it can no longer filter out particles efficiently, or even restrict flow. Usually, a faulty fuel filter will produce any of the following 4 symptoms that can alert the driver of an issue with the vehicle.

Can a clogged fuel filter cause low engine pressure?

Some vehicles come equipped with fuel pressure sensors that monitor the pressure of the overall fuel system. A clogged fuel filter may cause low pressure, which will set off the Check Engine Light to alert the driver — if detected by the sensor.

What causes the Check Engine light to go off?

A clogged fuel filter may cause low pressure, which will set off the Check Engine Light to alert the driver — if detected by the sensor. The Check Engine Light can be set off by a wide variety of issues, so having the computer scanned for trouble codes is highly recommended. 4. Damaged Fuel Pump

What’s the best way to increase throttle response?

More air volume and velocity at any given RPM is a surefire way to increase horsepower and throttle response. Achieving this at high RPM is easy, when the engine will be sucking significant amounts of air down on its own. Coming off idle, however, is a different story.

Can a tuner change the throttle response of a car?

If you’re looking for the knockout punch, combine the new with the old. Adding an aftermarket throttle body and topping it off with a new tune to fully take advantage of it is guaranteed to rock your socks off. What About Throttle Enhancement vs a Tuner? A throttle response tuner simply only changes that: throttle response.

Can a GT react when you touch the throttle?

A few programming changes and your EcoBoost or GT can react as soon as you think about touching the throttle. It is pretty impressive.

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.

How does a larger throttle body improve throttle response?

Larger throttle body allows for more air to pass through, supporting horsepower down the road. Better finish eliminates restrictions, allowing air to move faster and improve response. Increasing throttle sensitivity allows smaller movements to be detected, increasing throttle precision and control.

A few programming changes and your EcoBoost or GT can react as soon as you think about touching the throttle. It is pretty impressive.

Where is the throttle position sensor on a 3.8L GM engine?

(The tab inside the sensor MUST be touching the rotating pins in the throttle body. In a 3.8L GM engine, this means inserting it with then connector at 12 o’clock before rotating it to 9 o’clock for the final mounting position.)

Why does my Mercs motor bog down at high RPM?

Turned out, the inner lining of the gas line–Mercs best–has a separate membrane. This membrane–very thin–separated inside the line. When I would cruise at 2/3 throttle or less, no problem. Give it the full throttle and she’d bog down because it was crushing the inner membrane. New hose for $40 and problem solved!

What does the Check Engine light on a MAP sensor mean?

Sometimes, a malfunction in the MAP sensor or its circuit will trigger the check engine light (CEL). Scanning the computer, you may find a P010X series of codes stored in memory. Here is a brief description of these codes: P0105: MAP sensor circuit malfunction.

Can a bad mass air flow sensor trigger a check engine light?

Bad mass air flow sensor with no check engine light? Sometimes a mass airflow sensor can start to fail and even trigger engine error codes such as P0101 and P0102, without triggering a check engine light. There must be a problem with the mass airflow sensor circuit for the check engine light to illuminate.

What does the Check Engine light on a TPS sensor mean?

If your TPS sensor has turned on the check engine light, you may need to clear it with a scanner. The check engine light will not always go away after replacement of the TPS. The TPS monitors the position of the throttle valve, which regulates how much air is supplied to the engine.

The throttle position sensor is what monitors the throttle position from the shaft. Basically, this sensor is connected to a computer inside the vehicle which shares information sent by the driver. This information contains the actions of the driver such as accelerating, power steering and so forth.

Why does my car take so long to return to idle?

Poor carb sync is the most common reason for your complaint. The reason for this is that when the carbs aren’t synched well, one or more cylinders have to compensate for the underperforming ones (at idle). This gets the harder working cylinders into the progression of fuel circuits (at idle) to maintain proper curb idle.

Why does my car run so slow at idle?

A related and common cause is blocked idle circuits. Again, one or more cylinders have to compensate for the one (s) not contributing at idle. You then have to screw the curb idle screw into the point that the progression circuits are activated. Havoc ensues.

How long does it take to get a bike back to idle?

Improper setting of the curb idle speed. This should be done with an accurate shop-grade tach since the tachs on these bikes are notoriously inaccurate! Curb idle should be checked and re-set on a fully warmed engine. “Fully warmed” takes 15-20 minutes of running in typical weather.

Where can I get a fuel injector wiring harness?

For fuel injectors, or fuel injection wiring harnesses or connectors, check out O’Reilly Auto Parts.

What causes fuel injector to fail in O’Reilly car?

Injector seals and O-rings can also fail, causing fuel leaks near the top of your engine. O’Reilly Auto Parts carries fuel injectors for most vehicles, and many from OE supplier brands. Shop our selection and find the right fuel injectors for your repair.

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

Below are the top 5 symptoms of a bad idle air control valve which you will easily notice. Since the idle air control valve is supposed to manage the idle speed of the engine, a bad valve will certainly throw that out of whack. It will cause the idle speed to randomly fluctuate to different speeds rather than stay at one constant speed.

What happens to your car when you idle?

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.

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 should I do if my throttle response is low?

The first place that an automotive technician will likely inspect when the throttle response is low is the fuel filter. The filter is responsible for removing debris to avoid engine issues and to improve fuel economy.

Can a bad check engine light be a bad TPS?

The check engine light will randomly turn on and off even if the car is running smoothly without any jerks and stalling. This is often the first ever symptom of a bad TPS. Using a code reader, you should be able to confirm whether a faulty TPS is the culprit or a different component.

How to know if a truck has throttle response?

Were truck sat idling in gear mash on throttle up and down, engine rpm didn’t change a bit. Repeated probably 20 times truck just sat idling in gear. Then finally it started to respond. Went to 1st exit and going back to dealer stopped at a light. Took off truck went 1st gear then directly to 4th. With no ck engine light or anything.

Why do I lose throttle response when I shift into 4th gear?

The car’s a manual transmission and for no good reason I usually shift into 4th gear (out of 5th) slap down the accelerator pedal a couple time to rev the engine while the cluth is depressed between gears and the accelerator will wake up and I’ll get throttle response again and all’s well.

Why does the Check Engine light come on?

Check Engine Light comes on, accompanied by any of the above behaviors The throttle position sensor (TPS) is part of your vehicle’s fuel management system and helps ensure that the correct mixture of air and fuel is delivered to your engine.

When to call a mechanic for bad throttle control?

This could cause a serious safety hazard, as the driver is not able control the speed or acceleration of the vehicle. When this occurs, you should pull your vehicle to a safe place off the road and contact a mechanic as soon as possible to inspect why throttle control is not consistent. 2. Engine does not run efficiently

What are the symptoms of a bad throttle / accelerator pedal?

Symptoms of a Bad or Failing Throttle/Accelerator Pedal Position Sensor. $79.99 – $89.99. Average rating from 4,829 customers who received a Check Engine Light is on Inspection. The days of having to constantly adjust the throttle cable due to a loose nut on the carburetor are long gone.

How to install a new throttle position sensor?

Install your new sensor by working backward through the removal steps. Start by installing the sensor using the mounting screws. Next, connect your sensor to your vehicle’s electrical system using a convenient electrical connector. You should be able to easily push it together and hear a distinct click. Check to ensure a firm connection.

What is the Nissan car fault code 0304?

P0301 Microprocessor module detected misfire in the first cylinder of the engine P0302 Malfunction in the second cylinder of the power unit. Diagnostics of compression and the device itself is required. P0304 Code 0304 indicates a malfunction in the fourth cylinder of the engine

What does the code 0008 mean on a Nissan?

P0008 The combination 0008 appears as a result of the extension of the timing chain, which indicates its wear. It is necessary to check the integrity of the product, and if it really stretched, then replace it. P0011 Code P0011 or 0011 indicates an incorrect camshaft position.

What does the code 1320 mean on a Nissan?

P1320 The combination of P1320 indicates the absence of an ignition signal (“ignition signal primary”). To find the reason for the appearance of code 1320, you must first check the operation of the spark plugs and the switchgear. Also, the ignition lock is subject to diagnosis, in particular, its contact area and the “larva”.

What causes a clunk when depressing the throttle pedal?

Noise: Clunking when depressing the throttle pedal (takeoff) Cause:Worn U-joints; worn spider gears; worn axle splines; excessive gear backlash; loose yoke splines; worn slip yoke splines Noise:Clunk immediately after taking off from a stop Cause: Worn slip yoke splines Noise:Steady vibration that increases with speed

What causes a howling sound in the rear differential?

Broken teeth on the axle gear can result in complete loss of power when turning in any direction and eventually reaching a point where the gears don’t engage at all anymore, bringing the car to a complete standstill. There are various situations which can create rear differential noise. For example, howling of gears is a sure sign of wearing.

What causes a clunking noise on the driveline?

Cause: Bad wheel bearings Noise: Driveline squeaking or grinding at any speed Cause:Worn or damaged U-joints Noise: Clunking when depressing the throttle pedal (takeoff) Cause:Worn U-joints; worn spider gears; worn axle splines; excessive gear backlash; loose yoke splines; worn slip yoke splines Noise:Clunk immediately after taking off from a stop

Why does my rear differential make a clunking noise?

If the pinion bearings are the problem, they create more of a whirring noise than a rumble because it turns several times faster than the carrier assembly. Regular clunking every few feet can also be an indicator of a broken pinion gear and/or chipped and damaged ring gear.

Can a bad MAP sensor cause engine failure?

MAP sensor on footwell inside engine compartment. A bad manifold absolute pressure (MAP) sensor can upset fuel delivery and ignition timing. Depending on your vehicle model, your engine might experience one or more of these performance problems: However, these symptoms are not exclusively symptoms of a failed MAP sensor.

Why do you need to calibrate the throttle position sensor?

The calibration is critical to the fitment and ensures that the car’s ECU (computer) receives the correct voltage signal relative to throttle position as if this is incorrect then it can affect the performance & fuel economy of the engine.

How long does it take for GM throttle body to relearn?

If you don’t do a relearn procedure, the PCM will “hunt” for a new baseline idle. It will eventually learn it on its own, but it may take over a week of driving, during which time you will experience high and low idle speeds and possibly rough idle. 1) Start the engine and let it idle in park for 3 minutes.

What to do if your engine stalls after warm-up?

Re-installed started it back up and it seemed to run normally, but then stalled. Also, removed the coil rail and tested it with an OHM meter and it checked out. I ran the OHM meter over every switch and sensor I could find and have pulled and checked every fuse. Everything is in spec.I got a fuel pressure gauge hooked up.

Can a car die after a warm up?

This time they said the computer was dead. Jeep ended up back at my house after I got pi**ed-off at the shop for ordering the incorrect computer and letting two weeks go by without keeping me clued in on what happened. So, I have a car that dies after it warms up. It gets to just about 210 degrees and will shut-down.

Why is throttlestop not applying undervolt not working?

Throttlestop not applying undervolt. Throttlestop not applying undervolt. You have to apply the CPU Core and CPU Cache voltage offsets equally. On many recent CPUs, if you only try to adjust the CPU Core voltage, your request will be ignored.

Is there a way to disable power throttling?

Actually, should also work if all set to 51% or more. Do not disable the BIOS setting; it will reduce the power as you noted if disabled. Doesn’t make much sense, but that’s how it works. However, there is no reason to disable the power throttling.

What causes engine hesitation and stumble problems on the 90 +?

Then it developed an intermittent hesitation problem- you would be cruising at 60mph, on a 400 mile trip, ease off the gas pedal, and suddenly for 1/4 second, it was as though someone had switched off the engine and then turned it back on again. The car would then run faultlessly for the rest of the trip.

What does sputter, idle, hesitation under load mean?

Well, I have been having the same problems that many of us on here are having with an iradic idle, hesitation under load, and sputtering up to like 3000 rpm. My idle was so bad it started dieing on its own.

Why does my Mitsubishi Starion have engine hesitation?

As another example, I still have a 1987 Mitsubishi Starion, which ran perfectly for 35,000 miles. Then it developed an intermittent hesitation problem- you would be cruising at 60mph, on a 400 mile trip, ease off the gas pedal, and suddenly for 1/4 second, it was as though someone had switched off the engine and then turned it back on again.

What causes a Toyota to lose throttle response?

Toyota has been cleared, period.The NHSTB went on to say that the design used by Toyota for the electronic section of the throttle system was “well designed”. It could be a clogged fuel filter or a dying fuel pump, among other things.

What are the symptoms of a bad EGR valve?

A rough idle upon starting the engine (that is, when the engine is cold) and sometimes at a stop light or while looking for a spot in a parking lot (that is, at low engine speeds in a warmed-up engine). Stalling when the engine idles. Increase in fuel consumption.

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.

What happens when you replace the throttle body?

If you replace the throttle body, the PCM won’t know and will continue to use the adaptive settings as if the carbon buildup is still in place. If you don’t do a relearn procedure, the PCM will “hunt” for a new baseline idle.

Are there any problems with a high mileage VW?

It’s not a major repair but it can be an annoying problem. At the first sign of electrical issues, have the junction block on the battery checked out. While not exclusively a VW problem, high mileage turbocharged engines can experience poor performance.

How can I Reset my throttle position sensor?

Reprogramming or resetting your sensor can sometimes solve these issues. This step can also be necessary when you install a new sensor. The easiest way to reset your throttle position sensor is to unhook the negative cable from your battery for up to five minutes or to remove the fuse for your engine control module.

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