I have a 94 Cobra and after getting gas yesterday it started idling at 400-500. Turned the car off, turned it back on and it seemed fine for a moment but then it started idling at 1500. Anybody know what the problem is?
Usually it's the Idle Air Controller is all gummed up. It's a pretty common problem. You can try and clean it out with some throttle body cleaner, but the only permanent fix is too replace it.