I just bought a 93 cx w/a sohc-v turbo. It looks like it was pieced together but with mostly greddy parts. I'm fairly new to boostin but know most of the basics. the problem is that the car sputters when under load. when I check the boost gauge I can floorboard it until it reaches 0-1 psi. then I need to feather the throttle(like 1/4 throttle or less) just to keep it from sputtering. I just want it running ok so I can sell it . any suggestions? thanks