OK... i am goin crazy out of my mind. my 2000 grand prix is loosing power badly. Wut happens is that is that when i accelerate hard and the boost starts kickin in the car will stop accelerating feels like misfire but plugs and wires r new. took it to mechanic and he said cat could be cloggged changed cat... still same problem. i cant figure it out. Could it be a bad fuel pump????Maybe bad coils??? i dont know im runnin out of ideas plz help.... and if someone answered this already, im sorry for askin again i jus could not find anything on forums...