idle air valve

[danutt89gt]

my 97 GT (13.8 @102-- stock PI 4.6 2v with some bolt ons :) has always kinda hung in the rpm's in between shifts, but ever since i touched a SCT custom tune it has been agravating the crap outta me! before i sent the sct tuner back to the guy that made the tunes it would idle UP by itself when i pushed in on the clutch and it would stay at 3500+ now it still hangs in the rpm's in between shifts at 2-3000 rpm.i know its the idle air control valve but what the heck? what is so hard about getting it to act NATURAL when i let off the gas? it doesn't really do it on stock tune but it runs crappy. is it just some computer settings that can be easily changed or what????

[Cornholio]

Hard stop on the throttle body is miss adjusted or it is worn out, make sure IAC is at least 35% at idle when warm. Also, make sure you T/P reads C/T (closed throttle) when it is closed, not P/T (part throttle). You will need a good scan tool, ngs or wds to do this. Good luck

[danutt89gt]

i don't think its the hard stop cause the TB in a new 75mm and changing the car's tune alters the way the iac acts. ngs or wds?? is that software or something? i talked to some guy with a wideband tuner or something like that. will that work?