Should I wait for it to fail???

[GTSteve]

I've developed a very bad miss under acceleration\load and figured it was a cop going bad. My GT Vert has 120K. I replaced the fuel filter and the problem remained. I put new plugs in, no change. I replaced the boots that connect the plugs to the coil packs and still no change. I figured all the above needed replacing so no harm no foul. So I'm %99.999 sure its a coil pack going bad but from what I've read there is really no way to know which one is bad and its not throwing a code or warning. If I wait will it finally die and throw a code so I'll know which one to change or should I just go ahead and change them all? I figure I'll replace them with Accel COPs since I can get them at a good price...the dealerships wants $106 each for them...what a joke. Any comments about or experience with the Accel product, good or bad, is welcome.

 

[joshjwc9]

Take it to a Auto parts store and have them check your CEL to see if there are a store codes anywhere.

You could pull your plugs and see which one isnt burning cleanly and in which cylinder it is and replace that COP.

Also, I believe there is a way to test the COP's to see exactly which one isnt firing properly based on its volts.

 

[white-04]

Could also be a dirty injector? If you haven't already, run some injector fluid cleaner through it before going for COPs. Maybe Seafoam.