Yer its strange, misfires alot with heavy load.
It did misfire at one stage with the power fc but i simply pulled the coilpack loom off and shook it around and it was fine...
Plugs where changed fairly recently, havnt checked for fouling yet.
Could it be the standard computer isnt used to the mods it has? (turbo back exhaust, pod, fmic, running boost of actuator)