 When I start it up, it'll run about 600, 700 RPMs, and then it'll rev up. But after a little bit, after running it, it starts cutting out, and then it'll kind of pop and bang, and then the motor will die on me. So I let it sit for a little bit, and then it runs fine for a minute, minute and a half, and then the same thing. I've got headers on it. They're for the LS1 with the sensor on the back of it, you know, for the exhaust.