OK so i start my GP 04 its starts fine drive it all day, when i came home turn it off and let is sit for 1 hour or so the car starts to startle between 1000rpms and 15000rpms when its idling. So I decide it had to do with the computer not reading something right so I turn it of and let it be for the night. The next day I went back to turn it of and leave it in idle for a little to warm up and the car still had that startle to it but it was much worse, then it turn of. I found this really weird and went to turn it back on and it did for a little and the driver message center displayed "Reduce engine power/ stability control needs service/ traction control off". So after that come on i kind off back away from trying to start it again cause i was afraid of blowing my engine lol. Anyone have any ideas what this is do to?? I was talking to some people and they tell me it might be the alternator, MAF, Evap vac i really dont know??? so i am wondering if anyone has had any similar problems with there cars Grand prix 2004 compg??? OOO yeah NO CHECK ENGINE LIGHT ??????? SO I CANT HOOK UP A CODE READER TO READ IF THERE IS NOTHING TO READ LOL
