Hi all

Got car all sorted after head gasket hiccup. Still got one problem that you may be able to help with

Car runs fine on all boost up to about 1.55 BAR (above atmos). Anything above that, it missfires/ pops and farts.

Any ideas?

Currently running Stage 3 (greens, 3 bar map, bayjhoo chip, T35 turbo, RS500 intercooler)

Thanks