Idle Issue (Please Help)

what comes to mind. there are several factors which go into proper and correct idle. the throttle stop screw setting, function of the IAC, TPS, etc.

i would start at scratch and set it all up. if one component is out of whack, the other adjustments can be affected (i.e. throttle stop screw is not adjusted correctly). and if the idle is too far from stock, the puter will try to trim things it can to bring the idle back down.

have you pulled codes? dont omit ideas like a sticking EGR (allowing spent gasses at idle, which it should not), and things like that.

do you have good cold idle characteristics? how about when there is load (A/C on, etc)?

good luck.

oh yeah, im not sure what any exact differences are in the idle setting from a fox to an SN, but here is a decent write up for foxes. each page has steps for all the adjustemnts i outlined.

http://www.muscularmustangs.com/iac.html
good luck.

HISSIN50 said:

oh yeah, im not sure what any exact differences are in the idle setting from a fox to an SN, but here is a decent write up for foxes. each page has steps for all the adjustemnts i outlined.

http://www.muscularmustangs.com/iac.html
good luck.

Click to expand...

I have used the above link with excellant results...Like he mentioned, one affects the other...

Same thing happened to mine. I went through all the normal idle issue procedures to no avail. After that I sad fork it and I just bought a FMS 65mm T-Body which came with a new IAC and TPS...Bang...Problem was fixed. Good luck with it mang.