Hi,
I have had a prob over the last few months where the idle has been rough. Symptoms are: intermittent rough idle / engine shakes sometime when idle / seems to drive ok when it is going.
I rebuilt the double vanos about 3 years ago. I recently replaced both exhaust and intake solenoids and put new pistons / oil change a week ago. I changed the crankshaft sensor (exhaust).
My diagnostic machine reads ‘stiff exhaust mechanism’.
Any thoughts what might be the problem or what to look at next.
Thanks
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Z4 M54 exhaust vanos
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- Joined: Sun Apr 01, 2018 11:58 pm
Z4 M54 exhaust vanos
Update. Took the car to a BMW specialist. Worst fear diagnosed, vanos unit. This time I wasn’t up to sorting it myself. Anyway, got the car back today after the vanos unit was replaced. Problem sorted and idle is perfect.