Hello, I'm tryng to help my friend fix her car. It's a 2001 Pontiac Gran Am GT 3.4L with 113,000 miles. I did a complete tune up replacing spark plugs/wires and even the fuel injector for cyl #3. It still bogs/stalls/hesitates when you accelerate and Check Engine Light code still reveals P0303. At one time it did generate a P0300 which I understand it means multiple missfire. I was thinking it could either be the ignition coils or module, but before making any unneccesary expenses for her. What do you suggest?
have the same problem?
Thursday, March 15th, 2007 AT 4:18 PM