Car: 2001 Grand Prix GT - 199k, basically stock.
My car was overheating pretty badly, so I went to replace the radiator and noticed that the motor mount on the passenger dog bone was broken clean off. So while doing the radiator I replaced that. Once everything was back together, the car sounded good and ran good for about a week. Then randomly it would have a chopping idle while driving, and it seemed to be loosing power. This happened more and more. Now it's really rough.
Once I start the car, it sits at like 1300 RPM's until I put it into gear or the car is warm.
While sitting still, the idle jumps from around 800 down to 650 and back forth. If I put the car in neutral, it seems to help a little bit for awhile, then it starts to idle down to 650 and back to 800 again.
While driving, it feels like I have no power and it takes forever to accelerate and the engine on and off jumps really hard. But randomly it will stop and the car will drive just fine and have no issues with the idle. There have been no codes or SES light showing.
I'm not sure if I should start with plugs and wires and go from there or what.
