What causes the throttle body on a Mercedes to fail?

When there are throttle body malfunctions the wrong amount of air enters into the engine causing problems with air/fuel mixture ratio. Here is a close up picture of a Mercedes throttle body. Mercedes throttle bodies made by Bosch and VDO may fail. Luckily these units are repairable.

Where is the throttle possition sensor on a Mercedes?

Another weak point is the throttle position sensor. On models such as E-Class W210 and W208, the Throttle Position Sensor is mounted near the front left strut, on the front of the brake fluid reservoir. Replacing it takes less than 10 min and doesn’t require any special tools other than a 10mm socket and a screwdriver.

What are the symptoms of a defective throttle possition sensor?

Symptoms of defective Mercedes throttle body or throttle position sensor include: A common problem that you may notice is that the car drives fine under normal acceleration. If you press the gas pedal to the floor or try to accelerate quickly or floor it, the engine stops responding, RPMs drop and it may even go into limp mode.

When to replace the throttle possition sensor on a Mercedes Benz?

If you determine the throttle position sensor has failed on your Mercedes-Benz you will need to address this problem right away. In most cases, you will get code P0120 or P012x. Your options are to replace it with a new throttle position sensor.

What happens when catalytic converter is clogged in Mercedes?

If your catalytic converter is clogged you will notice a drastic drop in fuel efficiency and real struggle getting your Mercedes to accelerate. If the cat is completely clogged your car won’t even start.

Is there a problem with the Mercedes possition sensor?

Mercedes-Benz throttle body or throttle position sensor found on C-Class, E-Class, S-Class, CLK-Class, SLK-Class may fail causing idle issues, no idle or poor acceleration. Symptoms of defective Mercedes throttle body or throttle position sensor include: A common problem that you may notice is that the car drives fine under normal acceleration.

Why does my car engine not Rev at 3000 rpm?

Check the rotor arm, if you haven’t got like for like maybe you have bought one with a built in rev limiter. 3k revs is a bit low for that but you never know could also be ur timing is way off or advance is way off so it drifts so far it wont fire the mix anymore at 3k Trigger sensor for the ignition module, in the distributor, could be dying.

How to reset throttle possition sensor in Mercedes Benz?

First, try throttle reset procedure Turn the key to ON position. Press and hold the gas pedal for at least five seconds. Turn ignition off but do not remove the key. Remove key.

Why does my Mercedes C230 stall when I idle?

Folks I have a 1997 C230 Mercedes, This seems to be having the same problem, but when it Idles it runs rough and when driving it is stalling out but will re-start. I had the codes checked, came up with bad cam sensor. I replaced it as well the MAF.

What to do when your Mercedes goes into limp mode?

You may also get a check engine light if your transmission goes into limp mode. When a Mercedes-Benz goes into limp mode, it only operates in second gear and reverse only. When you put it in gear, you may also feel a bang as transmission engages. The first thing you should try is to check the transmission fluid level.

Are there any problems with the Mercedes transmission?

Including Engine, Transmission, ABS, Airbag, SRS, SBC Brakes, ESP, EPS, Air Suspension and more. In depth troubleshooting, but only works on MB cars. 2. Launch Creader X431 VII works in European, Asian and Domestic Cars.

Why is my Mercedes Benz W210 running rough?

Many times, a lean running condition can be traced back to a cracked or torn boot in the system. A good quick way to check the overall health of the system is to take the oil filler cap off with the engine running. If the system is in good shape, the idle of the engine should drop and the car will run rougher.

What’s the problem with the Mercedes Benz M104?

One problem with the M104 is that corrosion develops under the coating on both the inside and outside of the valve cover. The coating on the valve cover is something similar to powder coating. I’ve been told that this coating was added to aid in sound deadening on the top of the engine.

What to do if your throttle possition sensor has failed?

How long should I Leave my ECM at idle?

You will want to leave your vehicle at idle for at least 10 minutes which will give your ECM enough time to “learn” any new modifications installed on your vehicle.

What can cause a bad throttle position sensor?

If you notice your fuel economy has dropped dramatically, it could be a result of an improper fuel and air mixture. Similarly, if your engine struggles to idle efficiently, it could also be a result of a damaged throttle position sensor.

How to do throttle body re-Learn Chevy Malibu?

1) Start the engine and let it idle in park for 3 minutes. During that period the idle may be higher idle than normal. 2) After 3 minutes, turn the engine off and leave it off for 60- seconds. 3) Start the engine again and let it idle in park for 3 minutes one more time. During these run periods you may see a check engine light.

When to turn off the engine in a Malibu?

During that period the idle may be higher idle than normal. 2) After 3 minutes, turn the engine off and leave it off for 60- seconds. 3) Start the engine again and let it idle in park for 3 minutes one more time. During these run periods you may see a check engine light.

What should I do if my car won’t idle?

Step 8: Press the accelerator pedal to the floor and count for 10 seconds and then release the pedal for 10 seconds. Do this 2 times Step 9: Quickly press the accelerator pedal to the floor and then release three times. Step 10: Start the engine. If it does not idle correctly after this procedure, you will need to clean the throttle body.

What to do if your Mercedes possition sensor is not working?

Don’t start the car. Press and hold the gas pedal for at least five seconds. Keep the pedal pressed. Turn ignition off but do not remove the key. Now release the gas pedal. Remove key. Wait a minute before you restart your Mercedes. This allows resetting the High and Low points of the gas pedal.

How does the gas pedal work on a Mercedes?

Since 2000 Mercedes has been using drive by wire system. Which means you press the gas pedal but there is no cable connected directly to the throttle valve. Instead, there is a potentiometer that detects the position of the gas pedal.

How to reset adaptive shifting points on Mercedes Benz?

This procedure will reset the adaptive shifting points in your Mercedes-Benz automatic Transmission Control Unit (TCU). These simple do it yourself instructions take less than 5 minutes. No tools are required to perform this procedure and make your Mercedes-Benz shift like new. Try this if your car has been shifting sluggish recently.

How long does it take to shift a Mercedes Benz?

These simple do it yourself instructions take less than 5 minutes. No tools are required to perform this procedure and make your Mercedes-Benz shift like new. Try this if your car has been shifting sluggish recently. This will make your car fun to drive again, it’s like getting a free tune-up.

Why does my steering wheel vibrate when I accelerate?

Hi there. Typically when you accelerate and the engine or steering wheel is vibrating, it’s due to motor or engine mounts being worn out. During acceleration, the motor mounts the engine vibrates naturally as RPM’s increase. Engine mounts are the component responsible for securing the engine of a vehicle to the chassis.

Why does my Mercedes Benz hesitate to accelerate?

-Air filter and throttle body are clean. -I haven’t changed the MAF in the 2 years that I’ve owned the car, and i tried running the car with the MAF unplugged; the problem was the same except now the idle was constantly low and rough. The problem is slowly getting worse. I’m contemplating ordering a new MAF or maybe a set of new coils..

When did Mercedes Benz A140 braking system come out?

For stopping power, the A Class (W168) A140 braking system includes Discs at the front and Drums at the rear. The A Class (W168) model is a car manufactured by Mercedes Benz, sold new from year 2001 to 2004, and available after that as a used car.

What is the top speed of an Audi A140?

With a fuel consumption of 7.1 litres/100km – 40 mpg UK – 33 mpg US (Average), 0 to 100 km/h (62mph) in 12.9 seconds, a maximum top speed of 106 mph (170 km/h), a curb weight of 2216 lbs (1005 kgs), the A Class (W168) A140 has a naturally-aspirated Inline 4 cylinder engine, Petrol motor, with the engine code 166.940.

What are the specs of a Mercedes a class A140?

Browse Car Specifications… With a fuel consumption of 7.1 litres/100km – 40 mpg UK – 33 mpg US (Average), 0 to 100 km/h (62mph) in 12.9 seconds, a maximum top speed of 106 mph (170 km/h), a curb weight of 2216 lbs (1005 kgs), the A Class (W168) A140 has a naturally-aspirated Inline 4 cylinder engine, Petrol motor, with the engine code 166.940.

Is there a problem with the throttle sensor on a Mercedes?

What to do if your throttle body is defective?

If your throttle body is defective, you may not be able to repair it yourself. An alternative solution is to use a third party that will refurbish your throttle body. You will need to remove the throttle body from your engine and ship it out to companies that repair these units.

What kind of engine does a Mercedes W210 have?

This article specifically covers the W210 Mercedes with the M104 engine, however the concepts I’ll go over apply to nearly all fuel-injected gasoline engines. In a gasoline engine, the speed of the engine is controlled by the amount of air that enters through the throttle body. In a diesel engine, there is no throttle body.

What happens when a Mercedes engine misfire occurs?

As soon as an engine misfire occurs on a Mercedes-Benz, you will notice poor engine performance and strange vibrations that in some cases can be felt even in the driver cabin. The first thing that comes to mind when you get an engine misfire is: “This is going to be expensive.” Take a deep breath because in most cases it doesn’t have to be.

What are the most common Mercedes Benz transmission problems?

Top 5 Mercedes-Benz Transmission Problems. Won’t come out of Park gear due to a defective brake light switch. ( DIY How to replace the Brake Light Switch) Continue to read if you would like to learn how to troubleshoot your Mercedes-Benz transmission yourself and where you should start. 1. Check Fluid Level

Why does my car hesitate when I take off?

1) a hesitation or stutter when accelerating from a full stop. the harder I accelerate the more it hesitates. but only on take off, as if it cant handle the sudden surge of gas. If i baby the pedal (and i mean really ease on it) from a full stop nothing happens.

What happens when a Mercedes Benz goes into limp mode?

When a Mercedes-Benz goes into limp mode, it only operates in second gear and reverse only. When you put it in gear, you may also feel a bang as transmission engages. The first thing you should try is to check the transmission fluid level. The transmission has a dipstick tube but with no dipstick in it.

Why does my car hesitate when I open the throttle?

Many times an engine can hesitate without the computer detecting a problem, if this is the case proceed to the next step. Step 2 – Poor fuel pressure can cause the engine to go “lean” when the throttle is opened. The first check is to remove the fuel filter and check the flow by trying to blow through it, the filter should flow freely.

What causes the throttle possition sensor to stop working?

If you press the gas pedal to the floor or try to accelerate quickly or floor it, the engine stops responding, RPMs drop and it may even go into limp mode. Turn off the engine and restarting it usually fix the problem. In ost cases, the issue is caused by either a defective pedal position sensor or a bad throttle position sensor.

A bad TPS can easily cause jerking hesitation, since the computer thinks you’re rapidly opening and closing the throttle. If everything in the world seems to be going wrong at once, check your engine and frame’s ground straps and the battery connection. A bad ground will cause everything to act up, including the computer.

What should I do if my Mercedes fuel pressure is zero?

If your Mercedes doesn’t start, check the fuel pressure. If you are getting zero reading, you either have an electrical problem or a bad fuel pump. If the check engine light is on, consider yourself “lucky” as it can make your diagnosis easier. Note that not all faults will trigger the check engine light.

What causes a Mercedes Benz fuel pump to fail?

Typically problems related to the fuel pump and fuel pressure include: Under normal operation conditions, the fuel pump provides a constant flow of fuel. A failing fuel pump typically delivers too little fuel from the gas tank or in certain cases too much. Mercedes-Benz cars use an electrical fuel pump to pump the fuel to the fuel injectors.

Where is the throttle body fuel pump located?

As you’re already aware, the throttle body fuel injection system on your 1987 to 1995 4.3L, 5.0L, or 5.7L pickup (or SUV) uses a low pressure (12 PSI) electric fuel pump located in the gas tank.

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.

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.

What causes a car engine to stall after starting?

Engine stalling shortly after starting. The engine hesitates or drags while under load or idle. Hesitation and jerking during acceleration. The engine hiccups. Excessively rich or lean idling. A sensor that has been contaminated by fuel, varnish or dirt will under report airflow.

Can a stalling engine be intermittent driveability?

Intermittent driveability problems of any kind are always a challenge to diagnose. When a customer brings you a vehicle and complains of a stalling problem, you may not have much to go on other than their description of what’s happening and when it happens.

Is there check engine light for intermittent stalling?

Many times, there will be no check engine light and no fault codes to give you a clue as to what might be causing the engine to stall. So the trick to diagnosing an intermittent stalling problem is to catch the vehicle when it’s acting up — and that rarely happens when you have the vehicle in your shop.

When does the engine stall in a Mercedes?

There are never any notifications on the dash or any signs of it beginning to fail. This typically happens when I’m slowing down at an intersection or just driving slower in traffic.

Why does my car stall after a few miles?

When a bad module is responsible for an intermittent stalling problem, the engine will usually cold start just fine and run OK for short distances, but stalls after driving more than a few miles or when driving at highway speeds (especially during hot weather). It’s as if somebody suddenly turned off the ignition.

What happens when engine idle speed is above programmed range?

When the engine idle speed is either above or below the programmed range, the ECU prompts the ISC to either increase or decrease bypass airflow. Naturally, as the IAC prompts the throttle plate to open, engine speed increases. The IAC features a plunger mechanism that may be stuck/sticking.

What causes an engine surge during fuel injection?

In combination with the camshaft position sensor (CMP), the CKP signals are used by the ECU to manage fuel injection and spark delivery. A faulty CKP (or CKP circuit) can easily cause an intermittent misfire, which naturally results in what the driver may perceive as a surging effect.

What causes an engine to idle up and down?

A malfunctioning MAF sensor can cause a wild up/down engine idle speed (say, 0-2,000 rpm). This might be caused by a loose harness connection or by a damaged or contaminated sensing wire. The MAF sensor measures the amount of air flowing through the throttle valve.

What causes an engine surge when the ECU is off?

If closed TPS voltage changes, the ECU may assume that your foot is on the throttle, causing a richer fuel mixture to be delivered. This can also be caused by a faulty TPS, or even a poor ground. With the engine off, check TPS voltage with the accelerator pedal relaxed. Then work the pedal a few times and see if the voltage changes.

What are the problems with a Mercedes Benz?

Top 5 Mercedes-Benz no start problems 1 Engine Click, No Start 2 Engine Dies Right After It Starts 3 Car turns over, but it won’t start 4 The car makes a clicking noise but won’t start. Hint: Starter Problem or Low Battery 5 Key will not turn the ignition More …

Is there a problem with my Mercedes 380SL?

It has recently developed a weird problem and his mechanic is stumped. The car starts, but turns off it you let go of the key. Needless to say, it’s not possible to drive. This car has had ongoing problems. It first began when the car would just accellerate out of control. Removing the cruise control did not change this.

How many miles does a 1985 Mercedes 380SL have?

It’s a 1985 Mercedes 380SL with about 50,000 original miles on it. Grandma literally drove it once a week to the beauty shop for 20 years–has never even taken the top off. Grandson drove it around town and on the highway, and had TONS of things done to make up for the sludge of it sitting/running at low speeds for all those years.

What was the problem with the 1985 380SL?

The ’85 380SL had Bosch Platinum spark plugs–replaced them with NGKs. Intake, timing, and flow have all been monitored–no apparent problems. The diaphrgam and its “control arm” (if you will) sometimes get sticky/stiff…but not consistently. Fuel pump and fuel pump relay have been changed. Coolant sensor has been changed.

How often does Grandma drive her Mercedes 380SL?

Grandma literally drove it once a week to the beauty shop for 20 years–has never even taken the top off. Grandson drove it around town and on the highway, and had TONS of things done to make up for the sludge of it sitting/running at low speeds for all those years.

What are the symptoms of a bad throttle body valve?

A bad throttle body valve can cause a lot of different symptoms in your vehicle. Here is a more detailed list of the most common bad throttle body symptoms. The throttle body has some angle sensors and other sensors installed inside of it.

Can a bad throttle body cause high RPM idle?

High RPM Idle The throttle body controls the engine’s idle to make sure it is always holding a steady RPM. If there is a problem with the throttle body, it may cause the be way too high. A not calibrated throttle body can also cause this.

Can a bad throttle position sensor cause a car to shake?

A bad throttle position sensor can cause other issues on your car if left unattended. That’s right! If the sensor is faulty, it will cause your car to shake heavily. Eventually, if this issue is left unattended it will put major stress on your motor and transmission mounts to the point where they will give out and will need replacement.

How do you reset the gas pedal on a Mercedes?

Press and hold the gas pedal for at least five seconds. Keep the pedal pressed. Turn ignition off but do not remove the key. Now release the gas pedal. Remove key. Wait a minute before you restart your Mercedes. This allows resetting the High and Low points of the gas pedal.

What does the fault code on a Mercedes mean?

Mercedes Fault Code: P261F71 1 Check Engine Light 2 Little to no acceleration 3 Coolant leak 4 Brake Pedal Pressure 5 Engine overheating More …

What does Mercedes Fault code p0400 mean?

P0400 Mercedes Fault Codes Meaning Mercedes Fault Code Fault Code Meaning P0466 Purge Flow Sensor Circuit Range/Performa P0467 Purge Flow Sensor Circuit Low Input P0468 Purge Flow Sensor Circuit High Input P0469 Purge Flow Sensor Circuit Intermittent

What do I need to check fuel pressure in a Mercedes Benz?

Checking the fuel pressure is very simple. For this test, you will need a fuel pressure gauge. What you need is a fuel pressure gauge with Schrader valve adapter. A great and affordable gauge that we have used in the past is this Actron Fuel Pressure Gauge which works on Mercedes-Benz cars.

What causes a Mercedes Benz to not start?

In most cases you will get a fault code related to one of the following: 1 ECM / PCM computer failure 2 Camshaft position sensor 3 Shifter Selector module 4 Fault codes related to driver authorization or immobilizer 5 Electrical problems

Why is the battery on my Mercedes Benz not working?

Hint: Starter Problem or Low Battery This may seem obvious, but an old battery is the root of many headaches and can cause all sorts of malfunctions on Mercedes-Benz cars. How old is the battery on your Mercedes-Benz?

What happens when a Brake Booster fails on a Mercedes Benz?

Typically, if a brake booster fails, it will become very difficult to operate the brakes. This will feel like you have to push down the pedal much harder to get the car to slow down. An easy way to test if the brake booster system is working properly is to put your foot on the brake pedal with the engine turned off.

How long does it take for a Mercedes C class to respond?

A third of a second maybe (easily long enough to floor the throttle and raise it again without the revs moving), but a second is ludicrous! When you say “takes at least one second to respond”, do you mean it does absolutely nothing for a second and then suddenly takes off quite happily? Or do the revs rise and the car doesn’t accelerate?

Is the 2012 MB C180 petrol Auto Slow to respond?

My 2012 MB C180 petrol auto is very slow to respond to the throttle if I need to speed up quickly down a slip road to join a motorway or dual carriageway. I push the accelerator and it takes at least 1 second to respond.

How long is the delayed acceleration in a Mercedes C class?

As for the length of the delay, Kambites is right for most cars – it’s around a third to a half of a second. My year 2000 330ci was just over a second (I measured it using my friend’s professional filming equipment and software), but that was a very extreme case from an early implementation of DBW.

Why does my 93 F150 302 hesitate and surge?

EGR works properly. This problem is only in closed loop. While the engine is cold everything seems to work fine. I can open the throttle a bit, say 1500, and there’s a surge, or maybe you could call it an “anti-surge” where the rpms will drop a bit and engine roughens up a bit, then it goes back up and smooths out, then cycles back down.

First, try throttle reset procedure Turn the key to ON position. Press and hold the gas pedal for at least five seconds. Turn ignition off but do not remove the key. Remove key.

Why does my car stall in the Cold?

Engine stalling is more likely to occur during cold weather or when starting a cold engine. So, this kind of engine stalling problem often means the engine is not getting enough fuel and/or too much air. A cold engine needs a fairly rich fuel mixture to start, and to idle smoothly while it warms up.

What are the symptoms of an engine stall?

Here are some of the most common symptoms of, a faulty mass airflow (MAF) sensor; The engine is very hard to start or turn over. Engine stalling shortly after starting. The engine hesitates or drags while under load or idle. Hesitation and jerking during acceleration.

How to reset throttle body calibration [ step by step guide ]?

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. Turn ignition switch “OFF” wait at least 10 seconds.

How to test Ryobi S430 engine at full throttle?

Engine running, at idle, adjust the low rpm jet to slightly lean (turn clockwise until you hear loss of rpm) then back out the screw a bit, say one quarter turn. Now test full throttle. Squeeze the throttle control.

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 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.

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.

Where is the idle button on a W202?

The switch for the idle is inside the airflow plate body. The air flow plate works on a canter lever action that operates the switch, then the plate is closed, so should the switch be,,this can be checked with an ohmmeter from the plug on the side and the throttle peddle would be very sensative.

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!

Where does air leak in Mercedes Benz W210?

Just be sure to check all possible places air can leak in between the cylinders and the ICV. This also includes the oil dipstick O-ring, the oil filler cap, valve cover gasket, PCV valve and also the intake manifold gaskets. Sometimes, the process of eliminating all of the leaks can be quite frustrating.

How to check high rev and RPM idle after start?

To check for a sticky accereration cable, disconnect the cable from the throttle lever… turn on the engine and see if the idle is normal now. While the cable is disconnected, have someone depress the gas pedal while holding the end of the cable… if it is sticky, you will notice it.

What causes engine spluttering in a 2002 MBZ C320?

I have been experiencing intermittent engine spluttering (2002 mbz c320) – The licensed MBZ service guys I paid to diagnose said they couldn’t find anything ???? Then only the other day I was at the intersection, in idle, and put my foot on the accelerator to go, but it was completely unresponsive.

Navigation