Supercharged and high idle

[ef200098]

is my iac bad? ive checked eight times for vaccum leaks but cant find anything. or is the supercharger just blowing air through the TB? with the car out of gear it idles at about 2000-1500. should i try changing the iac? or can i just clean it out, how do i clean it out?

thanks
mike

 

[final5-0]

is my iac bad? ive checked eight times for vaccum leaks but cant find anything. or is the supercharger just blowing air through the TB? with the car out of gear it idles at about 2000-1500. should i try changing the iac? or can i just clean it out, how do i clean it out?

thanks
mike

You might try a pcm reset.

Later
Grady

 

[ef200098]

tried and still high idle. i could possibly have a leak between the upper and lower, but i seriously doubt that is it. what else can i do to at least determine if its my iac or not?

 

[final5-0]

tried and still high idle. i could possibly have a leak between the upper and lower, but i seriously doubt that is it. what else can i do to at least determine if its my iac or not?

Pull the plug on it and see if the rpms drop.

Later
Grady

 

[mo_dingo]

Attempts to clean the IAC valve usually result in a permenantly broken IAC valve. I have seen it personally, and multiple times here. IDK why, they just break when you expose them to carb cleaner.

See if you can close your TB stop screw more and your IAC valve screw more and see what happens.

If not, your IAC valve may be bad. Get a new one at pep boys (borg/warner part is only match, AZ doesn't stock the right one) and see what happens.
Scott

 

[ef200098]

what about advanced? no pep boys around here.

 

[ef200098]

tb stop is down as well as the iac screw and when i let the screw out it idles at about 2k and when its all the way down i idle at about 1.5k rpm. im going to go get a new iac valve and see if that corrects the problem, if it doesn't im driving the car off a cliff.


is there anyway i can find out if i have a vaccum leak or not?

 

[dstanggt50]

tb stop is down as well as the iac screw and when i let the screw out it idles at about 2k and when its all the way down i idle at about 1.5k rpm. im going to go get a new iac valve and see if that corrects the problem, if it doesn't im driving the car off a cliff.


is there anyway i can find out if i have a vaccum leak or not?

You can spray some carb cleaner in certain areas and see if the rpms climb, or chk with a vacuum guage, most auto stores sell em.

 

[ef200098]

i have a vac/boost gauge, it reads at about 22" at idle. what should my vac be at idle?

 

[final5-0]

Did the idle drop when you pulled the iac plug?

Later
Grady