I am throwing a code for "traction control" which can cause all of the symptoms that I've been having, oh, my car is a 99 gtp, and after it warns up even slightly, cylinders 2-5 all misfire up to 20 times, at random times... Sometimes causing the car to stall... I have a lack of power at high rpms, and very poor fuel mileage... Also very skippy missing puffing popping rough idle, bad enough to make me put the car in neutral at red lights just to keep it alive