Pontiac Repair: 2002 grand prix, service engine soon light, full tank

Question
hey todd, my name is chris and i am from oklahoma.  i was just reading the post about the 2002 grand prix running rough and the car stalling out and i am having identical problem with my wifes pontiac. Her car might run fine for 2-3 days, then it will start runnin bad again, there is no consistancy to it. Hers is 2002 grand prix supercharged.  i was wondering if you ever figured out what the problem was with the one in the post?  any information you could provide me with would be greatly appreciated, since i dont really want to just start by replacing expensive parts that i dont know if they are even faulty.  you can email me if you need to at    The post i am speaking of was up feb of 2009.   thx in advance....Chris

Answer
Hey Chris:

I'm not sure what that question was all about I have answered thousands of questions on here. does yours run rough first then stall out or does it sall out and when you restart it it runs rough? When it stalls does it bog down or is it just like someone turned the key off? when does it stall during a closed throttle like at a stop light or does it stall out cruising down the road? when it stalls does it start right back up or does it labor and crank a long time before it fires up? Any service engine soon light? does it do it more on a full tank of gas or running low?