I own a 03 chevy 5.3 liter z71 runs good but loses all throttle response. check engine light comes on and says loss of engine power. i pull over put it in park it has a rough idle. i can push on brake and gas pedal nothing happens i push on gas pedal alone and have a little reponse in rpm. i have changed out my air intake sensor, throttle body, plugs and wires, throttle sensor, and exhaust sensors. None have fixed my problem. Is there something else i can do to fix my problem
Cars & Trucks - Chevrolet - Cavalier - 1996 Chevrolet Cavalier
Answers & Comments
Sounds like fuel starvation. 1) change fuel filter. 2) change fuel pump. GM pumps don't hold up to water in the tank (methanol fuel) very well. Its a 2003 so its probably time. Never replace as many parts as you have, without first performing an OBDII scan of the stored fault history, to avoid buying parts you don't need