97 cavalier
 

my engine light came on and the car started to idle rough
computer showed multple engine mis fire
after tune-up,replacing coil packs and ignition module.it is still doing the same thing.
can anyone help?

RE: 97 cavalier
 

You might want to take it to a dealer and have them run a diagnostic. You don't have to have them fix it but you will pay somewhere in the neighborhood of 70 -100 bucks. I know the crank sensor isn't the fix all to every problem but if it is mis-firing it may just be the crank sensor which costs around $20.

RE: 97 cavalier
 

check your tps (throttle position sensor) and your idle air control sensor, and make sure all ur plugs are in tight