RB25 throttle bodies have the adjustment screw allready there.
Just to quickly clarify, AAC (Auxiliary Air Control) is the hose that goes into the intercooler pipe to feed extra air into the engine when the throttle is shut and IAC (Idle Air Control) is the hose from the heater that feeds warm air into the engine when warming up, correct?
Question, how is it that a lot of cars from factory run fine without AAC (Such as a JZA80 Supra). Is it because they are map sensored so it makes it easier? I have tried pissing my AAC off back in the day but the Microtech simply hated it even though it is MAP sensored. So what's the go?