Hey, I have a rb20 w/r33 turbo swapped r31, the car runs, and idles fine with no issues, however whenever its revved to above 4-5k+ rpm when you let off the throttle it goes down to 0 rpm and stops running, it doesnt sputter or make and unusual noises just falls and doesnt recover. If you blip the throttle to catch it when falling its fine and goes back to idling normally. Wondering if anyone can help me out here, I really don't know what I'd be looking for on this. After fiddling with the AAC valve it seemed to fix but when I tried it again a few hours later still was doing it. Perhaps the AAC adjustments didnt do anything and instead once its warm its fine (yet to test this).
Any help appreciated.
Its got a nistune ecu in it