I sure hope I can get some help with this issue. I have a 2004 grand prix with about 86000 miles on it. I recently made several trips to Texas from Michigan and back with it and ran flawlessly. I did maintain the car VERY well before each trip, and after each trip. After my last trip is when this came into play. Everytime I start the car after it has been driven a bit that day, it'll stall right after it starts and will continue until I put my foot on the gas and even then it will try and stall. I have noticed that if I don't keep the defroster on so the fan runs it will heat all the way up to right before the red over heat marks as well. It does have a new thermostat, air filter, regular oil changes, new gas tank, the tank filler hose and evap system. Im at a loss, it won't give me a dummy light so im clueless. Any advice or pointers where to check would be VERY appreciated.
