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Old 03-25-2020, 03:49 PM
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Default Engine Stumbling on Acceleration when cold - Help diagnose

Car is a 2011 BMW Z4 50,000 miles. Car stumble on acceleration when cold and has a periodic miss when idling. When the engine is fully warmed up the problem pretty much disappears.

I'm getting the attached codes;

Looks like it points to the eccentric shaft sensor. However, it feels exactly like multiple coil pack failures....
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File Type: jpg Fault codes.jpg (881.5 KB, 2 views)

Last edited by john222; 03-26-2020 at 03:43 PM.


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Old 03-26-2020, 07:34 PM
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Well, removed the eccentric shaft sensor plug and it's full of oil. I would guess that's my problem...
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Old 03-31-2020, 08:06 PM
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Replaced eccentric shaft sensor. No more fault codes, but problem remains.
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