Engine stumbling on cold acceleration

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javis20
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Engine stumbling on cold acceleration

Post by javis20 » Wed Mar 25, 2020 6:05 pm

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 they are pointing to the eccentric shaft sensor...
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Last edited by javis20 on Thu Mar 26, 2020 4:53 pm, edited 1 time in total.

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ph001
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Engine stumbling on cold acceleration

Post by ph001 » Wed Mar 25, 2020 8:07 pm

What engine?
2007 E85 Z4 3.0Si manual :driving:
19" CSL's | Eibach Springs | Aeroskirts | Z4M front bumper | Clear brake light | ZHP | RCH+| Stubby

2004 E46 M3 coupe manual - gone but not forgotten.

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javis20
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Engine stumbling on cold acceleration

Post by javis20 » Wed Mar 25, 2020 8:38 pm

Engine is 3.0i N52

I'm going to check to see if there are any oil leaks inside the eccentric shaft sensor plug area tomorrow morning.

javis20
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Posts: 174
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Engine stumbling on cold acceleration

Post by javis20 » Thu Mar 26, 2020 5:55 pm

Well looks like the eccentric shaft sensor is leaking..
Maybe I'll do a tutorial..
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ph001
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Engine stumbling on cold acceleration

Post by ph001 » Thu Mar 26, 2020 8:47 pm

Yep, oil on there is not good. Happens a lot on the 2.0 E85, but quite rare on the N52. Tutorial would be great 👍
2007 E85 Z4 3.0Si manual :driving:
19" CSL's | Eibach Springs | Aeroskirts | Z4M front bumper | Clear brake light | ZHP | RCH+| Stubby

2004 E46 M3 coupe manual - gone but not forgotten.

Image

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