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Originally Posted by 335i Pal
I have noticed under medium to slightly hard acceleration that my car stutters where it almost feels like small and quick speed bumps. It is not shaking the whole car by any means but I feel it mostly through the gas pedal. While WOT I do not feel anything. This happened both when I had my JB4 in and without.
I know it is hard to diagnose from just my description, but just wondering if anyone else has had a similar issue, not sure if it is an engine issue or possible a transmission issue.
2007 335i e90
JB4
BMS DCI
Not sure if important but new turbos under warranty.
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Sounds like its time for you to do the walnut shell blast. I had the same exact problem and it fixed it for me.