hi,
My 2002 passat has had some problems, first I had no heat this winter I had the thermastat changed and now I have some heat. But I am not sure how hot it is actually supposed to be since I bought the car used in August. The temp gauge is normal. My second problem is my check engine light is on the problem code is secondary air intake, my third problem is that it started to randomly misfire while idling although I am sure that the engine is not running correctly driving it down the highway either, because my gas milage has dipped down to around 23 mpg average from 28. Any help would be greatly appreciated.

 

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