I have a 1999 Grand Prix GT that has 178,000 miles on it.... Daughter was driving it home the other night, and it got warm on her so she stopped and had coolant put in it, it cooled right down, she started to drive again and the service engine light came on and the car died, and now it will not restart. We installed a new fuel pump, new fuel filter, Cam sensor, crank sensor, temp sensor. We have good spark and fuel pressure... really seems like a timing thing, it will crank just fine, and when you let off of the key from trying to start it, it chugs like the timing is off.... Any ideas of what to check, I am at a loss on were to go from here??? Any input would be greatly appreciated.
Thanks!!
