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1999 Cherokee Sport Mechanical Start up issue

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Old 02-04-2013, 10:00 PM
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Default 1999 Cherokee Sport Mechanical Start up issue

Sometimes my cherokee starts perfectly fine and sometimes it does this
Ive changed spark plugs computer and intake filter. Any other ideas?
Old 02-04-2013, 10:08 PM
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All of the electronics on your Throttle body. Start by cleaning those out with some carb cleaner. It looks like your IAC, TPS are both clogged. Were you giving it gas in the video?
Old 02-04-2013, 10:09 PM
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https://www.cherokeeforum.com/f59/to...h-idle-155383/
Old 02-04-2013, 10:31 PM
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Yeah i was about 2500rpm not a whole lot but i was constant with the gas. Otherwise it wouldnt of started and died like it did at the end (which is when i took my foot off the gas)
Old 02-04-2013, 10:46 PM
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Originally Posted by Jmb94
All of the electronics on your Throttle body. Start by cleaning those out with some carb cleaner. It looks like your IAC, TPS are both clogged. Were you giving it gas in the video?
Yeah i was about hitting the gas at about 2500rpm. Otherwise it wouldnt of started and died like it did at the end (which is when i took my foot off the gas).
Old 02-05-2013, 02:11 PM
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Looks like the check engine light was flashing in the video. Have you tried reading fault codes at an auto parts store?
Old 02-05-2013, 08:21 PM
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Originally Posted by Muaddib420
Looks like the check engine light was flashing in the video. Have you tried reading fault codes at an auto parts store?
Nope but ill do it asap, i c-foamed it today ill keep you guys updated. Thanks for the suggestions.
Old 02-05-2013, 10:30 PM
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Originally Posted by Patrick Fals
Yeah i was about hitting the gas at about 2500rpm. Otherwise it wouldnt of started and died like it did at the end (which is when i took my foot off the gas).
That's Idle Air control (IAC) then. I can't remember which electronic part it is, but odds are all of them need cleaning. Take off the Throttle body, and then take off the electronics. Clean out everything with carb cleaner. Make sure you reattach all of the electronics.
Old 02-06-2013, 10:14 PM
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Originally Posted by Jmb94

That's Idle Air control (IAC) then. I can't remember which electronic part it is, but odds are all of them need cleaning. Take off the Throttle body, and then take off the electronics. Clean out everything with carb cleaner. Make sure you reattach all of the electronics.
Thanks man, will clean it up by the end of tomorrow and ill let you know how it goes. Thanks for all your help, will keep you posted!
Old 02-06-2013, 10:31 PM
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Yea Ill second that it the IAC valve. If that doesnt fix it Id aim towards the TPS. Good luck
Old 02-08-2013, 04:59 PM
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Update?
Old 02-10-2013, 02:26 PM
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Originally Posted by BimmerJeeper
Update?
Sorry for the late update guys I was busy with personal issues. Regardless I was able to clean the IAC earlier today heres a pic of how dirty it was

1999 Cherokee Sport Mechanical Start up issue-image-3347526932.jpg

It didnt start at first crank but on the second i hit the gas on start up and it started up with no problem. I drove it around my block and then i turned it off then back on and it started perfectly Thanks for all your help ill let you guys know how my jeep is responding the next few days.
Old 02-10-2013, 03:47 PM
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Went to turn it on maybe 2 hours after the IAC cleaning and it gave me the same problem as in the video not as severe though... Any other suggestions? Thanks in advance.
Old 02-10-2013, 08:25 PM
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Originally Posted by Patrick Fals
Went to turn it on maybe 2 hours after the IAC cleaning and it gave me the same problem as in the video not as severe though... Any other suggestions? Thanks in advance.
Get a New IAC!
Old 02-11-2013, 05:06 AM
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What exactly did you clean?
Does that pointy head on the right side get stuck?
Does that push in and out?
You just made sure it could freely move?

Also, what cleaner did you use?


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