whitestang97

i just installed a 75mm throttle body and a new intake plenum...but now when i am driving and come to a stop and let the car idle it idles real high...like at 2G...put if i turn the car off and on again it idles normal...whats the deal??

MoKo_04GT

well.....not sure if this is the same....but, back when i had a jet chip installed....when i first installed it, my car did the same thing. idled at about 2k. it took about 15minutes of driving for the cars computer to learn the new parts. now that i think about it...i installed the new 75mm TB and plenum at the same time i did the jet chip, so maybe it was the TB and plenum that caused it. either way driving for about 15-20 minutes fixed the issue. took the computer a minute to adapt.

whitestang97

well i have been drivin with it on for a couple days now

swooshonln

try unplugging the NEG terminal of your batter and letting it sit for about 10 min.

re-attach and turn your car on and let it sit for another 10 min.

that should trick the computer to re-learn your cars idle

NeedStangSpeed

If that doesn't work, unplug the IAC and see if it fixes it.

oxfordgt

The proper way to set the idle with a new TB is to unplug the IAC (electrical connection) and adjust the set screw on the TB until your idle rpm is 100 rpms below the desired rpm then plug it back in. Disconnect the battery to reset the KAM and you should be fine.

whitestang97

it idles fine when i just start the car...its just that once you rev it up it then it starts idling high will unplugging the IAC fix that?? and what is the IAC and where is it at??

1999 GT

hmm...i agree with everyone else...just try reseting the IAC..if that doesnt work lol who knows

whitestang97

whats the IAC...wheres it at???

AmericanRicer87

+1 this should have been on the paper that comes with them if you bought it new.