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Mine has actually beendoing that too. It did it less in colder weather, but now it does it almost every time I start the car. The RPM goes over 1k then rev's up to 1,300-1,000. I called my service advisor and he told me to try filling up Chevron a few times "It's better gas".
All I have is JB4 Stage 2, Injen Intake, muffler delete.
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2011 Alpine White E92 335i M-Sport N55 Engine
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