Why does my C200 idle up and down?
Currently my C200’s idle is going up and down. Once I slightly press on the throttle pedal the idle will get even more aggressive up and down. The throttle itself too has no response. No matter how i depress it the engine is not revving up.
Why does my C200 throttle have no response?
The throttle itself too has no response. No matter how i depress it the engine is not revving up. Scanned with a MB Star, it has no fault. What could have caused this ? This sounds like it might be a problem with the throttle body, assuming it is electronic as they are on the w203 onwards (maybe w202 as well).
What are the symptoms of an idle air control valve ( IAC )?
Another symptom of a potential issue with the idle air control valve (IAC) is; an illuminated Check Engine Light. If the engine control module detects an issue with the idle air control valve circuit or signal; it will set off the Check Engine Light to notify the driver that there’s an issue.
Why is my idle speed control valve not working?
One common problem is a buildup of carbon or fuel varnish deposits in the idle speed control valve. The cure for this condition is to clean the valve, with some aerosol throttle cleaner or engine top cleaner. Disconnect the air intake ductwork from the throttle body.
Currently my C200’s idle is going up and down. Once I slightly press on the throttle pedal the idle will get even more aggressive up and down. The throttle itself too has no response. No matter how i depress it the engine is not revving up.
The throttle itself too has no response. No matter how i depress it the engine is not revving up. Scanned with a MB Star, it has no fault. What could have caused this ? This sounds like it might be a problem with the throttle body, assuming it is electronic as they are on the w203 onwards (maybe w202 as well).
How to troubleshoot your Mercedes Benz air conditioner?
Identify the location of your compressor. Look at the pullyer and you should be able to see if it spining or not. The engine running turn the A/C on max cool, set fans high, and make sure that the clutch is engaging on the compressor. The pulley spins any time the engine is running. The center part of the A/C pulley only engages when the A/C is on.
Why is the throttle not working on my 203?
This sounds like it might be a problem with the throttle body, assuming it is electronic as they are on the w203 onwards (maybe w202 as well). It might be worth trying to reset the throttle body, I believe there is a procedure to do this, the one that works for my 203 is:
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.
How to know if your Mercedes C class is idle?
Check for vacuum leaks with a smoke generator injecting smoke into any vacuum line and see where the smoke comes out. That’s a leak that needs to be plugged. Other than that, there is the Idle Control Unit computer and the Idle Control Adjustment Valve, all which control the idle.
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.
Why is my MerCruiser EFI stalling at idle?
Mechanic sent ECU files over to Mercruiser for diagnosis. They couldn’t find anything wrong, but suggested it might be injectors. Checked injectors at throttle body. They work fine. On chance, he had a second throttle body in the shop. He replaced mine with that one, including injectors.
Why does my MerCruiser not surge when cold?
Part two of pulling of the coolant sensor is the ECM thinks the engine is cold so in-turn the RPM will be higher….Closer to 700 RPM and the desired idle will (should) be set higher as well which could be another reason the engine won’t surge when cold because the sensor values are all higher and the ECM is compensating for those readings.
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.