Engine Performance problem
2002 Pontiac Aztek 6 cyl All Wheel Drive Automatic 116000 miles
The problem seems to come and go. The vehicle will run great for a day or two, then it'll start acting up again. I put on a new fuel filter and had about the same pressure readings. I then had new plugs and wires installed. That seemed to help for about a day. The "Service Engine Soon" light always comes on when it's running rough. And it flashes often too, indicating a misfire. Two different mechanics confirmed it was misfiring on cylinder 1. I then had my fuel system and injectors cleaned. It ran great after that. For a few days. Last night, I sprayed down the MAF with some special MAF cleaner. That didn't help either. I also misted the engine with water to check for arcing, but didn't see any. Could it be the coil pack? Help please!
have the same problem?
Saturday, August 21st, 2010 AT 12:02 PM