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1990 BMW 325i Question: Black smoke , rough idle high RPM

 

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Visitor, Lithonia, GA, March 01, 2010, 15:50

My car idles rough and black smoke with high RPM .Its a stick shift so it BUCKS at will due to bad RPM.

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  • Answer #1

    Bret Bodas from RepairPal Test Shop, March 01, 2010, 16:06
     Master

    This is indicating a rich running engine. Check the fuel mixture and fuel pressure, make sure they are within spec and resolve accordingly.

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