Thread: 2001 Grand Prix Gt wont fire!!!!!!!!!!!

starter is fine. I had it taken up to the shop 4 days ago because it wouldnt start. and thats when the cps was changed. Then computer was reading a bunch of misfire is cylnder 6 so changed coil pac. while on computer running after that was running good took the computer off started misfiring so left car at shop. then that was when ignition module was changed. It was running perfectly and properly when computer diagnostic done after that. took car home ran fine til next morning when to start. doing the same thing it was when i took it to the shop. it will turn over just wont fire. if keep key turn trying to start it will backfire sounding like a shot gun. I will try to get a video up of what sounding like or doing.