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I've changed my apark plugs and I still have a puff of white smoke when I start. on 1998 BMW 740iL

Is it possilbe for a intake gasket to be bad. Sometimes the power is low, but when I get up to speed I have no problems.

Asked by for the 1998 BMW 740iL
POSS VALVE SEALS NOT ALWAYS THOUGH. GET A DIAG AND EST
THANK YOU I WILL
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POSS VALVE SEALS NOT ALWAYS THOUGH. GET A DIAG AND EST
THANK YOU I WILL