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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Pontiac Technician
Category: Pontiac
Satisfied Customers: 2376
Experience:  GM Grand Master Technician 2007. 14 years experience.
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Car is 2007 Pontiac Grand Prix GT runs smoothly at Idle but

Customer Question

Car is 2007 Pontiac Grand Prix GT runs smoothly at Idle but once you floor it engine hesitates check engine light is now on. Code P0420 I replaced the catalytic converter. Car through out same code. Car backfires and runs horrible
Submitted: 1 year ago.
Category: Pontiac
Expert:  FIXITMAN replied 1 year ago.

Hello, my name is***** you tell me what size engine you have and how many miles are on the vehicle?

Customer: replied 1 year ago.
3.8 ltr. Supercharged 117500
Expert:  FIXITMAN replied 1 year ago.

I am sorry for the delay in getting back with you. Did you still need help with this?