Idle too high 86 auto
Thread Starter
Burning Brakes
Joined: Sep 2006
Posts: 756
Likes: 2
From: EDMONTON ALBERTA
Idle too high 86 auto
Please help my car idles too high, 86 auto i have to press the brakes hard to not move when sitting at the lights, i backed off the idle screw on the TBI, the car idles at about 1400 or so.
Thanks
J-P
Thanks
J-P
Team Owner
Joined: Jan 2003
Posts: 20,324
Likes: 250
From: Summerland B.C. Canada
The ECM should be controlling the idle speed via the IAC. Go through the process of setting min idle and then TPS. You may have a vac leak or your IAC may be stuck wide open.Did this appear out of the blue ??
https://www.corvetteforum.com/techti...D=55&TopicID=2
Burning Brakes
Joined: Apr 2007
Posts: 754
Likes: 0
From: North Carolina
Melting Slicks
Joined: Jun 2005
Posts: 2,938
Likes: 2
From: Arkansas
Mines's doing the same thing, I pulled the IAC valve to look at it and it's all the way in.....which appears that it's letting too much air through the throttle body causing it to idle high.
I pulled the stopper on the valve out as far as it will go, re-installed it and started the car up again...same thing. Almost like the ecm is making it open all the way up.
Everything on my car as far as TPI is brand new, all new sensors, hoses, cleaned etc.....
But it's doing exactly the same thing as your car and it's as simple as it can get with no emmissions....I guess I need to start looking for vaccum leaks.
I pulled the stopper on the valve out as far as it will go, re-installed it and started the car up again...same thing. Almost like the ecm is making it open all the way up.
Everything on my car as far as TPI is brand new, all new sensors, hoses, cleaned etc.....
But it's doing exactly the same thing as your car and it's as simple as it can get with no emmissions....I guess I need to start looking for vaccum leaks.
Last edited by 1982CorvetteDude; May 28, 2007 at 10:06 PM.
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Verdad Gallardo
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Don't touch that damn idle screw, leave it alone!! Gah, put it back where it was! Many times a faulting TPS sensor can cause this. Test yours and make sure you are in the area of 0.54V at idle.
