I have a 2002 Sunfire and I have taken it to three different places and still do not know what is causing it.

The car gets to 45 mph, starts jerking really bad, the trac off light pops on, if you keep driving the car stops, it's still running but no matter how hard you push on the gas it doesn't rev or go, you then have to put it in park, turn the car off, then turn it back on.

I've had wires, plugs, ignition coils, fuel filter, and new transmission put in.