My 02 Grand Prix GT 3.8 started fine after work tonight. It ran fine for the 1/8 mile drive to the Speedway on Steltzer. I filled up, and when I started the car to pull away, it would not stay running.
Anything under 1400rpms, and it would die. I had to drive home (including 2-3 miles of bumper-to-bumper holding the idle up above 1400-1500. Car sounded rough at all rpms. Reminded me of a vacuum leak.
No engine lights, no other symptoms.
Any ideas? I would have said bad gas, but the fuel that was sitting in the fuel rail would have still been from the previous tank, I would have thought. Problem continued ~30 miles (and is still happening).
Engine has 88k. Full tune up done a couple months back. Has K&N CAI and 160 stat.