'86 Idle problem

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Sep 19, 2007 | 04:30 AM

machinegunminky

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Joined: Aug 2007

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From: Mesa Az

'86 Idle problem

I recently changed the thermostat in my '86 and now it idles at 1300 RPM and Im stumped....What could I have done wrong?

Sep 19, 2007 | 08:58 AM

JamesRS

Corvette Enthusiast

Joined: Oct 2003

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From: La Quinta CA

Sounds like you may have knocked a vacuum line off. Check around the intake for loose vacuum lines. A simple test is to spray a little carb cleaner in the area that you were working on and see if the idle speed changes at all. If it does, then it's a vacuum leak.

Sep 19, 2007 | 09:06 AM

AGENT 86

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From: Summerland B.C. Canada

Look at the bottom of TB on drivers side. There is a vacuum line that comes from there and goes to EGR relay(bolted to thermo housing). From there, a vacuum line heads to EGR diapragm. Maybe you broke one of those lines.

Sep 20, 2007 | 02:58 PM

machinegunminky

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From: Mesa Az

well I did what you said and there doesnt seem to be any type of vaccum leak...any other suggestions? Please help!!

Sep 20, 2007 | 03:06 PM

RRT vette

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Joined: Feb 2006

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From: Louisiana

Swapping a t-stat shouldn't change the idle. I think you need to recheck your work. Did you take the throttle body off to change the t-stat? Disconnect any sensors in that area?

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