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Old 06-01-2011, 07:14 AM   #1
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Unhappy 1989 High Idle

I have a 89 yj 4cyl that idles great when cold but when hot reaches about 12-1300. I cannot find anyway to lower this..any ideas.

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Old 06-01-2011, 07:26 AM   #2
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Yours is still a carbureted engine, right?

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Old 06-01-2011, 02:24 PM   #3
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89 Four cylinders are throttle body injection.
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Old 06-01-2011, 11:14 PM   #4
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Same issue with mine. Take some carb cleaner and begin giving little spritzes around the joints. If you have an airleak somewhere, that will let you find it pretty quickly.

An air leak would cause the mixture to be lean (more air than gas), so the system is dumping more gas in to get the mixture correct, causing the high idle, or so I am assuming.
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Old 06-02-2011, 06:52 AM   #5
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high idle

I will try that ..Thanks
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Old 06-06-2011, 07:28 AM   #6
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High Idle

I tried spritzing the carb cleaner and cannot notice a difference ..New Thermostat (190) and Rad and its now showing that its running about 220...thats what its showing.

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