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      03-02-2012, 10:00 AM   #117
nailer335
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Drives: alpine '08 e92 335xi
Join Date: Feb 2010
Location: Arizona

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FWIW I think as the car adapts to the new plugs it eventually gets better if not fades completely.

I changed my plugs maybe 3-4 months ago and the stumbling was conspicuously bad for the first thousand or two miles but now it doesn't seem to happen very much if ever anymore.