I cut off catalytic converter on my gxp now car won't start
Its because u need the back pressure they give off
So, see what happens? Who did the cuttin'? I don't think it is pressure, but there is an oxygen sensor on the CC- maybe disconnecting that has something to do with it? idk, sounds weird to me- doesn't make sense, really-
I agree. I don't think back pressure has anything to do with it. If they eliminated a sensor that could certainly do it. Look underneath. Maybe the sensor is still there but got disconnected during the catalytic converter removal.
Looking for a Used Grand Prix in your area?
CarGurus has 3,749 nationwide Grand Prix listings starting at $1,195.
Search Pontiac Grand Prix Questions
Pontiac Grand Prix Experts