2002 MB S420 Hesitation A Comprehensive Troubleshooting Manual

Fuel injectors may become dirty over time and not be able to provide as much fuel to the cylinder as is needed. Dirty fuel injectors may cause the engine to run ... I think you should at least have the transmission fluid checked to be sure it's ok. If the fluid is low it could cause this problem. eurotec : The next ... This is normally caused by a dirty butterfly flap in the throttle body which causes a small air leak and confuses the ECU. Its easy to clean.... Despite the lack of codes or vacuum leaks, the car struggles to move, even after swapping the Mass Air Flow (MAF) sensor, testing the actuator, ... This occurs when the car is fully warmed up, when going from 4th down to 3rd. It has approx. 18k miles, and other than this "quirk", it performs very well. If it has, and considering the age of the vehicle, fuel filters, pumps, and accumulator play into this issue. Water in the fuel can cause ... Most hesitation problems are caused by a bad mass air flow sensor. A bad sensor will give you a code that looks like a vacuum leak. It could be your crank position sensor is starting to go bad. I would also change out your fuel filter. Sign in to reply. The acceleration problem returned with fault codes relating to voltage on 3 coil packs. I replaced all 8 coil packs (aftermarket) and cleared ... 2002 S500 (119k miles) and I'm having a couple of consistent problems ... I have a horrible hesitation/bog/powerloss under acceleration and ...