Pontiac Grand Prix Forums : Grandprix

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...

any mods? maybe have the f.p. checked...do a search to see what fp should be at. have u had car long? me or some one here surely can give good advice........ lol, give more info please

replace the fuel filter next, but doublecheck your pulley size to make sure your not running too much boost. The fuel filter could cause the car to be fine at idle and have good fuel pressure but under higher rpms cut out or lose pressure if it is dirty. Also have the car scanned for codes.