hey guys.. i have a r33 s2 skline running an aftermarket kkr430 turbo with stock comp/injectors. it gets to about 4,500rpm and stutters/cuts, was running 14psi on the stock gate..so i got a boost controller and wound it down hoping that it was factory fuel cut/boost cut?... but it stil does the same thing even on very low boost, was running fine on the stock turbo, wat do yas think the problem could be? maybe just needs a tune with the new turbo? any help would be awesome cheers.