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Old 01-09-2017, 06:23 PM
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Idle issues and i think a cracked intake manifold

Hey ya, hope you guys can help me out with what i think might be multiple problems. Last week i was having issues with my jeep idling at the right RPM's, kept wanting to drop down. This week it wont idle at all, each time i stop at a light, I have to feather the gas to keep her alive.
I removed the air intake and looked down the throtle body, noticed a dark, burnt ring around the throttle and inside the intake manifold i noticed oil like residue glazed the whole inside, also saw a crack on the bottom side of the manifold.
What i am wondering is, is this just as simple as replacing my intake manifold, or are there multiple issues here.
thanks in advance,
paul

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Old 01-09-2017, 06:34 PM   #2
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it is extremely beneficial -particularly now that there are so many possible engine types , motors , all manner of parts and modifications - to provide images or , if a new member , read how to use a photo hosting site such as Photobucket or Flickr or Imgur to upload and have a shareable link to a photograph you take of what you describe. It not only helps you , but helps others that may have been thru the same issue on same model Jeep as you're experiencing it upon. Please add images if possible. Sounds like it could be as involved as what you ask about or could be as simple as a dirty butterfly valve on throttle body but how to know?

Welcome to forum, btw.

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Old 01-09-2017, 08:53 PM
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Here is the crack, i am trying to add more photos
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Old 01-09-2017, 08:55 PM
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Old 01-09-2017, 09:00 PM
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Old 01-10-2017, 09:50 AM   #6
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I would first pull the throttle body off and clean it as well as the IAC sensor with Throttle Body Spray. That will clean off all the carbon and oil residue (that is know to cause a unstable idle).

You can then further inspect the intake for a crack that could be causing an airleak. If it is cracked there, you can probably fill the crack with JB Weld (or even an oil resistant RTV) as a temporary fix to stop the airleak, until you replace the manifold.

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