I have a bad high rpm miss over 4800 rpms's the car starts to sputter and backfire really bad until i shift gears. The opti, plus, wires, and coil are all less than a year old. I was wondering if new o2's or if it could be fuel related, and where i should start looking Nothing appears to be arcing. Any help or advice is appreciated, I want to finally be able to go to the track again soon
Thanks,
Brandon

 

 

Change the fuel filter first, and then check your fuel pressure to see if you are losing pressure at WOT. That would indicate a bad fuel pump.

Also check all connections on wires, opti, and coil.