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Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!

How to fix a high idle

  • Garydree24
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8 years 7 months ago #5409 by Garydree24
How to fix a high idle was created by Garydree24
How to fix a high idle of 2001 mitsubishi eclipse gt

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  • Tyler
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8 years 7 months ago #5426 by Tyler
Replied by Tyler on topic How to fix a high idle
Hey Gary, welcome!

There's several different things that could cause a high idle... Have you done any testing yet? Stored trouble codes?

This is the 3.0L engine, correct? Those are MAF systems, which tends to rule out vacuum leaks as a cause for high idle. Looking at scan data during the high idle would be the next best step, if possible.

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8 years 7 months ago #5444 by jeremy.steiger
Replied by jeremy.steiger on topic How to fix a high idle
Could be a bad idle air control valve (iacv).
When these go bad it will compromise your idle. Also check the accelerator cable if it gets hung up or moved from the holder it will give you problems. Lastly I would check your throttle position sensor some are adjustable to raise or lower the idle. Check out the youtube video on adjustment.

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8 years 7 months ago #5445 by jeremy.steiger
Replied by jeremy.steiger on topic How to fix a high idle
Some throttle bodies have a screw on the back that will adjust the idle.

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