Hey guys, I'm new to these forums. I am looking for some help with my moms benz. She has been having this issue that has progressively gotten worse. It started out that she noticed a slight vibration during acceleration when her car shifted to second gear. Fast forward a month and the car shakes in just about every gear. If you look closely her rpms are bouncing slightly. It honestly feels like a missfire, but there are no cels. I recently replaced her fuel pump because it died, and the issues seemed to maybe start after that. It was an aftermarket URO parts pump, but I use those parts pretty frequently when working with Audis, and never had an issue. Thinking it might not be a strong enough pump potentially. Please help me out with this guys, let me know what to check for with these cars. Thanks in advance!

 

The pump and or the installation of it is your problem.

 

Please UPDATE YOUR PROFILE in USER CP. Is it a gas or diesel engine?

 

Hi, was it the pump in the right side of the tank you replaced, or the highpressurepump?


Mike