I have had a bogging problem on hard excell. I changed cap ,rotor, plugs , and wires. It seemed to go away but came back a few days later. It also seems to miss at idle. Any ideas are is there another ign i can go to.

 

Have you done a code scan for any hidden codes? Have you checked your fuel pressures at idle and under load? Don't just throw parts at it, narrow down your problem to the true one, don't treat the symptoms. What trans does your car have, also additional mods (signature?).

Jonota

 

mostly stock,4L60 trans, no codes,fuel pressure good

 

welcome. well as far as ignition parts you still have the coil and module. hook a scanner to it or get a program(search for several diff ones)with a laptop and see what it reads when you accelerate hard causing your problem. you could speculate all day. is it throwing any codes? do you have any exhaust leaks causing the knock sensor to pull timing? your opti could be taking a crap. btw, make a signature so people know what you have and anything you have done to it. it helps. good luck.

 

Checked timing? Any weird noises? Anything install/removed/modified prior to the problem happening? Checked intake for rips/tears? Ignition coil/module in good condition (I believe both can be tested)?

Jonota