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Old 04-03-2011, 01:16 AM   #1
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High idle?

Hey everyone,
Lately I have been having an issue with my jeep idling high, or getting stuck at high RPMs when driving. For example, if the RPMs stay high while in gear, I can put it in neutral, pull over, open the hood and push on the throttle. I can push on it to make the RPMs go down, but it doesn't usually stay there, they just return to the original high RPMs. I am kind of stuck as to why it would be doing this. For now I am gonna try disconnecting the battery for a while to try and make it "forget" if it happens to be something with the TPS. I am not sure if this will do anything. Any input is appreciated. Feel free to ask questions If necessary also. Thanks as always

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Old 04-03-2011, 07:54 AM   #2
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Not sure where the link is, but there is a throotle cable adjustment I believe too. Do you have any vacuum leaks? That will cause high idle also.

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Old 04-03-2011, 09:05 AM   #3
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Quote:
Originally Posted by steve_k_37801
Not sure where the link is, but there is a throotle cable adjustment I believe too. Do you have any vacuum leaks? That will cause high idle also.
I don't believe it is a vacuum leak. I will look into the throttle cable though. I was curious if there was some way to check the cable.
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Old 04-03-2011, 09:16 AM   #4
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any check engine lights? mine seems to toss out a check engine anytime ANYTHING is wrong, including when my TPS took went out, so the cable would make sense with no codes, heck my check engine light came on when my lighter fuse blew trying to use a 12V aircompressor to fill my tires lol
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Old 04-03-2011, 06:12 PM   #5
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No CEL. I wheeled the crap out of it today with nothing unusual happening...weird
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Old 04-03-2011, 07:00 PM   #6
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come to think of it when i bought the jeep it had an idle issue with no CEL and it turned out i just needed to clean the IAC / throttle body, try that yet? i took the IAC apart and cleaned it pretty good
this is what it looked like inside, even after spaying half a can of cleaner down the intake with it running-


and this is after taking an old toothbrush / TB cleaner to the housing---
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Old 04-03-2011, 07:36 PM   #7
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That may be a good start because I haven't cleaned that since I have had it. Wouldn't hurt to give it a try
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Old 04-03-2011, 07:38 PM   #8
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pretty easy, took about 30 minutes to do mine, and i took the whole throttle body out and cleaned it
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Old 04-03-2011, 07:50 PM   #9
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also i reused the gasket on the housing, no problems, its pretty fragile though
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Old 04-03-2011, 07:55 PM   #10
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Thanks for the input. I love free fixes...and hopefully that's what this will be
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Old 04-03-2011, 07:58 PM   #11
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free fixes are always the best lol, GL
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Old 04-03-2011, 10:28 PM   #12
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If it a sensor on the tb was bad it would throw a code more than likely. But a dirty sensor will not throw a code so i would deff. try cleaning the TB and the TPS.
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Old 04-03-2011, 10:38 PM   #13
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Quote:
Originally Posted by nickeagle
If it a sensor on the tb was bad it would throw a code more than likely. But a dirty sensor will not throw a code so i would deff. try cleaning the TB and the TPS.
The throttle body on the tj is easy four bolts the air intake and your good DO NOT submerge the whole TB in cleaning solvent but us throttle body cleaner and spray it and make sure that the IAC vale holes are clean

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