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Old 10-15-2012, 11:49 AM   #3
ceyl
 
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Drives: 2012 2SS/RS M6
Join Date: Apr 2012
Location: Colorado
Posts: 36
Initial start-up, if near 30 degrees it runs rough, after a couple min it runs good. Has not registered any misfire codes.

Haven't checked for vacuum leaks. Even a vacuum leak doesn't make sense to me that it only occurs when cold. This has been going on for a couple of years. It passes emissions in the summer time.

I will look for a vacuum leak.

Thanks
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