Hi all, im new to this forum. Okay so I have recently purchased a vehicle its an r33 GTS-4+T to the best of my knowledge these cars came out rb25de and auto. To put it in a nut shell the 33 is running like a bag boost is cutting out around 4,000RPM-4,500RPM have changed plugs put new gcg high flow turbo but am unsure of how to fix this. Cheers