hmmm u mean u want to change what rev's the car idles at? if so follow the accel cable n it goes on top of engine to throttle body theres a mounting thing with the cable n 2 nuts clamped on each side to hold it in place just slacken nuts then move the nuts(ie screw second nut on more for more higher revs or less cant remember) to how much idle u want etc...dont have to play with the ecu its just like if u were restin foot on the pedal theres also a screw for the butterfly which basically does same thing but if i remember its not really meant to b adjusted but done via the throttle cable...well this is my 2p