Revs are jumping up and down.

Question

In my 2009 BMW E90 revs are really unsteady while idling. The issue appears suddenly after some ride and then idle mode. The car is jerking while doing this. What could it be?

Answer 1

Hi thanks for using our new Q&A  section.

about yours 2009 BMW E90 best way come in by to our shop to be diagnosed , but from our experience it may be several  issues: like vacuum leak , faulty throttle body , or eccentric shaft position sensor fault.  

hope my answer will be helpful

have a good day !