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post #1 of 3 (permalink) Old 02-16-17, 05:19 PM Thread Starter
Join Date: Feb 2017
Location: New Hampshire
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High idle

I have a 1995 Mystique V6 with a 3000 rpm idle. I have replaced all sensors, rewired and insulated all wires I could see, replaced IACV and tried two remanufactured ECMs. The IACV gets a continuous 12v. I have put some resistance in the line to bring the idle down to 1100, however this is not the right way to run a car. Anyone have any ideas?

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post #2 of 3 (permalink) Old 02-16-17, 06:21 PM
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Join Date: May 2012
Location: Upstate New York
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Re: High idle

Is it possible your cruise control is stuck on? Another possibility is a sticky throttle cable.

Ever notice that there's so many high performance parts available for GM products?

Did you ever think that maybe they NEED them?
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post #3 of 3 (permalink) Old 02-16-17, 10:16 PM
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My thought is that there is a short or the curb idle has been messed with causing the ecu to command the iac wide open. Have you tried to disconnect it while idling?
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