I need help . Rpm unstable problems.
Thread Starter
Junior Member
Joined: Mar 2018
Posts: 34
Likes: 1
From: maryland
2012 c63 amg w204 coupe
I need help . Rpm unstable problems.
My car start acting werid when is driving for example 50 on 7 gear and i step in little bit and the rpm was up and down unstable for a second . Just feel werid. And also when is cold start and i reverse it jump and then vibrate and put on drive the car wont go until i step in the gas pedal. But when thr car is warm up the virbrate is not that bad. I recently change the engine mounta and transmission mount. The main problem just my rpm while im driving is start acting unnormal. Few months ago i got engine light on said my mass intake sensor problem. I clear the code the light never went on again. So few day ago i found that code but the light wasnt on. So does c63 require to do throttle body cleaning stuff like that ? Or is my transmission problem. Im sorry my english not that well.
Super Member
Joined: Dec 2012
Posts: 600
Likes: 6
From: Bay Area
2010 C63 P31 AMG
Could be a few items but you can start with cleaning MAFs in each air box, replace air filter if ever...could be spark plugs or coils but depends on your mileage...could be PCV valve needs to be changed...vacuum problem as well have caused similar.
Thread Starter
Junior Member
Joined: Mar 2018
Posts: 34
Likes: 1
From: maryland
2012 c63 amg w204 coupe
my car mileage is 104k . Im try clean the airbox sensor and see how it goes. Thx
