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Cherokee revs on idle!!!!

Old 09-29-2017, 10:01 PM
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Default Cherokee revs on idle!!!!

Ok guys this is weird, if I let my cherokee sit overnight and start it up in the morning everything is perfect but if i drove to work and then try to leave before it cools back down it will start up and idle at 2500 rpms. I’ve let it do that for atleast 30 seconds and it hasn’t went back down so any help will be appreciated thanks.
Old 09-29-2017, 11:39 PM
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Throttle body sensor dirty?
Old 09-30-2017, 03:24 AM
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Actually just went through cleaned all sensors in the throttle body and the throttle body it’s self.
Old 09-30-2017, 05:24 AM
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Check for broken or unhooked vacuum line.
Old 09-30-2017, 08:20 AM
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good suggestion. I was thinking a few shots of carb cleaner might point to the source
Old 09-30-2017, 08:25 AM
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What year is it?
Old 09-30-2017, 07:54 PM
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check your vacuum lines. Theres a broken line or a missing cap on the intake somewhere
Old 10-03-2017, 07:06 AM
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I am having the same problem, very high RPM, after it warms up it settles down.
I need to locate the throttle body sensor and clean it.
I found one cracked vacuum tube.
Old 10-03-2017, 07:14 AM
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Originally Posted by ByronW
I am having the same problem, very high RPM, after it warms up it settles down.
I need to locate the throttle body sensor and clean it.
I found one cracked vacuum tube.
What year?
Old 10-03-2017, 07:53 AM
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1988
Old 10-03-2017, 07:57 AM
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Originally Posted by ByronW
1988
Go to my website www.cruiser54.com and do Tips 1 through 5 before doing anything else.
Old 10-03-2017, 08:14 AM
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Will do, thank you.
Old 10-03-2017, 08:20 AM
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Originally Posted by ByronW
Will do, thank you.
Keep us in the loop.
Old 10-03-2017, 08:32 AM
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I will, this won't be a rush thing, but I will be working on it and asking questions.
Old 10-03-2017, 08:40 AM
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Originally Posted by ByronW
I will, this won't be a rush thing, but I will be working on it and asking questions.
Don't buy any more parts until you've completed the tips.

Got a multimeter?

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