Can someone please help me on this one, When I'm driving and am coming to a stop the RPMs drop to 600 and I get engine vibration for 1-2 seconds then the RPM needle bumps up a little again, vibration is gone but then the needle starts to bouncing very slight to the point it does bother also I can noticed the engine note changing..

Dealer won't touch anything or check without CELL

Anyone that might had a similar issue or a clue to what this can be? Dirty throttle body, brake booster

Thanks

 

Check the maf sensors if it is dirty also you should clean the manifold from the carbon risidue time to time

 

Thanks I was planing on cleaning the throttle body, I'm thibking the manifold is similar, what product do you use?

Another person told me it could be a bad TPS

edit : I cleaned the throttle body, car feels much better, but needle still moves a little, also noticed the intake manifold when folding the flap I can tell there is a lot of oil or grease not sure what it was, is this is normal?

thanks

 

The dealer cleaned my manifold so ai dont have any idea what they used . Try to turn off ac it is drops again than clean the manifold. Carbon risidue is pretty normal in this direct injection engines. If you clean the manifold check the bolts in the crankshaft

 

Thanks I'll clean that, I only have 11k miles, weird to have so much gunk in there, throttle was ok, but it did help a little

The vibration after letting the foot off the brake its still present, will keep looking for solution, unless thats caused by 1- engine mounts
2- vacuum leak or tranny

 

a small vacuum leak perhaps, small enough not to throw a CEL?

 

Thats my thoughts I only have the problem on idle and letting the foot off the brake.. Also yesterday when I was on heavy traffic I was having a lot of hesitation, I was lifting my foot from gas pedal to slow down felt like some suction was stoping me and as soon as The rpm needle was at around the 650 The feeling that the car was gonna stall on me was present didnt want to risk and was giving it some gas