You didn't change anything since it ran fine at the track, and started to crap out? I say ignition coil. Does the "mis-fire" change with engine load? When it does it's thing at 3000 rpm, is that wide open throttle only, or any load?
I changed nothing! It's at wide open throttle only. It has a surge when you are cruising but no backfiring.
The coil is brand new but that may not mean anything. It's an MSD blaster 2.
