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Old 04-24-2008, 05:38 AM   #1
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high idle while in park and driving

i just bought this thing and this never happened while test driving it. I took it for a spin last night and when i was driving i could feel the idle go higher and the car was going faster without the gas pedal, i pull over in a parking lot and put it in park the idle goes to 2,000 rpm easy, i tried again this morning and as soon as i start it up again it goes to 2,000. does the idle get stuck on jeeps or what,

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Old 04-24-2008, 06:20 AM   #2
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What is the year and what engine is it? It sounds like your idle screw on the carb needs to be adjusted, pending it is from '87-'89.

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Old 04-24-2008, 09:59 AM   #3
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high idle

do a check of all the vacuum lines to make sure there is not a leak. or throttle body/carb. or intake manifold leak. Quick way to check for gasket leaks is to spray some carb clean around the gaskets while the engine is running. If the idle goes up that means that the carb clean is being sucked through the gasket area. goodluck.
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Old 04-24-2008, 02:57 PM   #4
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its a 92.
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Old 04-24-2008, 05:31 PM   #5
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just bought a tsp sensor 50 bucks and it didnt work im gonna buy a iac valve and try that.
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Old 04-24-2008, 05:35 PM   #6
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clean the throttle body, and check for binding thorttle cable. something can be holding the throttle plate open a little.
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Old 04-24-2008, 06:55 PM   #7
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i just tried a iacv and it didnt work, they are different lenghts about .25 the one from the jeep is about 1 inch and the one i just bought is about 3/4, does this matter do i have the wrong one, i have checked the cables, looks alittle loose but is got 200,000 miles on it,
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Old 04-24-2008, 08:21 PM   #8
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im a idiot, there was something in the intake and it runs fine now, probabyl take the parts back.
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Old 04-27-2008, 10:12 PM   #9
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great

sounds like you found a vacuum leak. Always try the easiest thing first.

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