Quote:
Originally Posted by --g--
Just to update this post with the issues my car had, and the solution.
A day after getting my 2008 330i m sport the car started to rough idle (only once the car had warmed up) it would get to the point that the car would shake, and then twice it cut out completely.
Give to BMW - they check codes and say its the eccentric shaft sensor.
Replace sensor - no change.
Further investigation points toward a vaccum leak.
They found the leak (sorry - I don't know where exactly it was) this solved the problem.
I was getting a high pitched hissing noise while it would rough idle. I had thought it might be a lose belt - it sounded like that anyway - but this was the air leak. So should you have the high pitch noise (that will go away when you bring the revs up, or drive under load) then it might well be a vaccum leak. Have a smoke test done and I hope that fixes your problem readers!
G
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Reviving a dead thread as I have similar issues. I believe I have the whining issue, so maybe a vacuum leak? Here's a video of my issue:
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