when the temp outside goes up the car runs better, when it is cold it will backfire, no codes. this all started after the engine was replaced, also the milage went down to 10 miles per gallon, till it warms up out side, it went back up for a short time when i had the front and rear punkins rebuilt. reviewed all connections for the past year and replaced numerus parts < mass air flow, temp censor , tune up , etc.
Apr 25, 2008 at 8:23 AM