Ok, I been have this same problem with my car for over 3 months now. My check eng light keep pop out the same codes. I took it to a shop and its been there for over 3 months. At frist the guy say it was my computer that went bad. Got a new one my car is still have the same problems. Then it was my wire harness, Got a new one its still have the same problems. I went up there today he said my computer is bad well he thinks when he takes my conputer out and put it into another pontiac it works just find but in my car it has problems. My car want stay started if I keep my foot in the gas i works just fine. It want cut off if I'm driving it but when I come to a stop thats when my car cuts off.