Idle Issue - Yes Another

[TealZR1]

After opening her up a bit and as I come to a stop, idle wants to stay at 2000rpm or so. I tap on the gas pedal, she comes down to 750 rpm. Anything in particular I should look for? Thanks in advance...

[Roadster]

This is directly from Marc Haibeck's website.... zr1specialist.com

"High idle speed is most commonly caused by a vacuum leak. The throttle body can cause a high idle if a throttle plate binds with a bore.*If the high idle is intermittent or goes away when the accelerator pedal is kicked, the high idle is caused by the throttle body. If a light tap fixes the idle, the problem is with the primary throttle. If a hard kick to 25% throttle or more helps, the problem is with the secondary throttles."

Hope this helps....

[ssrszz4]

So a vacuum leak would cause a constant high idle?

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[G8nightman]

Originally Posted by ssrszz4

So a vacuum leak would cause a constant high idle?

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Yes

[TealZR1]

I am the original poster about the idol issue. The fact that as I coast down to a stoplight it sticks out about 1600 RPM, I tap on the pedal and it goes back down to 650 RPM, I may have a problem with the primary secondary cable?

[Billy Mild]

How many miles? I bet your throttle body needs a service.

[RICHARD TILL]

You may be experiencing a normal situation. My car doesn`t return to normal idle speed until its fully stopped.

[TealZR1]

Thanks to all who have responded. By the way, what things need to be done to service the throttle-body

[ssrszz4]

My '90 does the same thing sometimes, after about 10 miles or so when it's heated up it comes back to normal idle.

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