hello i have a 93 pontiac grand prix with a 3.1 and it keeps sputtering and then quits. i can start it and it will run for about 30 to 45 minutes and ten it starts idling rough and then dies. i have replaced the pcv valve,map sensor,oxygen sensor,throttle position sensor,egr valve,idle air sensor,and the fuel filter. i dont know what it could be. maybe in the fuel system? any comments or answers will help. thanks
May 8, 2008 at 8:41 PM