Idle Problem
Thread Starter
Instructor
Joined: Apr 2003
Posts: 205
Likes: 0
From: Saugus Ma
Idle Problem
My 86 is idling high betweek 10-11 RPM. This just started. It use to idle between 6-7 rpm. I sprayed some WD40 on the linkage & cable but it didn't help. Is there an easy way to adjust the idle?
Drifting
Joined: Nov 2001
Posts: 1,783
Likes: 2
From: Latham NY
Re: Idle Problem (Jerry D)
You could have a vacuum leak. Check all the hoses and the black plastic vacuum lines that go under the plenum. They become brittle and break with age and heat. Is your IAC working? Try resetting it.
Thread Starter
Instructor
Joined: Apr 2003
Posts: 205
Likes: 0
From: Saugus Ma
Re: Idle Problem (Bluevette85)
A/C is working. Just coverted to R134.
When I first start the car the compressor clutch click on for a second and moves a 1/4 turn. This happens every minute or so. Is this normal?
A/C is not on at the time.
When I first start the car the compressor clutch click on for a second and moves a 1/4 turn. This happens every minute or so. Is this normal?
A/C is not on at the time.
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: Idle Problem (Jerry D)
If you don't have a vacuum leak, pull the IAC motor from under the TB and clean the pintel and it's bore. Then reset base idle with the method on my site.
If that doesn't fix the problem, replace the IAC.
If that doesn't fix the problem, replace the IAC.
Drifting
Joined: Nov 2001
Posts: 1,783
Likes: 2
From: Latham NY
Re: Idle Problem (Jerry D)
IAC is Idle Air Control valve. It is screwed into the bottom of the throttle body and lets a controlled amount of air in to adjust the idle. It has a 4 pin connector on the passenger side of the throttle body. Read this tech tip for information: https://www.corvetteforum.com/techti...D=55&TopicID=2
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