thanks for the replies, ive checked the coils and plugs and they are fine, would i need a fuel pressure gauge to check if fuel was the problem?
plus what is compressor surge?
It does it almost all the time when i hit 7psi in 5th gear on the highway and it doesnt matter if im doing 2500rpm or 3500rpm, its always when it hits 7psi. Could it be wastegate flutter? I have a custom dump pipe.