Thread: 97 Grand Prix GT very randomly stalls at idle

CPS is looking more like the problem... It stalled out on me while driving down the road... And the rpm tach was jumping around slightly up from where it rests, it was like pulsating...

Okay so I changed my IAC valve, and it seemed to idle and run a lot better! Then I went to the store and when I came out, I had the same problem it would start then die immediately I had to keep the gas down to keep it running. Even then it was sputtering and a lot of smoke was coming outta the exhaust. I managed to start driving and I could put ti to the floor and it would sputter along at no more that 20mph.. I let off some and it sputtered up to about 30, then it seemed to clear up and ran fine again, I had all the power back all of a sudden... Stopped at a light and it was alright, I got on it some and it could break the wheels loose no problem...

I have changed the IAC and the cam shaft positioning sensor so far... This is driving me crazy since it will run fine one monent and not at all/barely the next...