Misfire Under Load While Tuning

[teazn_r33]

i have just started to tune my power fc r33 gtst after sorting the boost controller out

we were bout to go into more depth tuneing but at around 280rwkw the car misses a heap under load so i changed plugs and gaped them

same problem happened

i have everything on my car i have the splitfire coils power fc and so on

has anyone had a slpitfire coil die on them also remember its only under load

i have in the past replace the ignighter the one that sits one the coil cover

i have a dyno comp on sat can anyone help ??