RB20DET HARD CUT?

[jesse0357]

hi all,
i have a s13 with an rb20det it runs great but when i get up to around 5500 rpm it just cuts hard! i have to let off the throttle and then when i give it gas again its fine almost like a speed govner..
ive posted before about a simlar issue so sorry for the new post i never got my answer.

it has new
maf
coils
igniter (j30 swap)
stock internals, ecu, and turbo with a fmic,
manual boost controler set around 13-14 lbs of boost

i didnt think rb20s had a boost cut but maybe it does
any help would be great thanks!