high idel
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Junior Member
Joined: Dec 2008
Posts: 40
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Year: 1987
Model: Cherokee
Engine: 4.0
high idel
so i just started it up in like 30degree weather and its idelin high so i drive it and it still is even after i get home so i pop the hood and unplug the tps and it idels down to normal but i seen my exhaust manny glowin red what could this mean..
Renix Super Guru
Joined: Mar 2008
Posts: 24,653
Likes: 19
From: In yourz postez fissin jurr spelinzs
Year: 1990XJ/1989MJ
Model: Comanche
Engine: 4.0L Renix
Do as Stryker suggests. The red exhaust indicates that you are running rich. Check your O2 sensor. There is a procedure to do both in the tech write-up section.
Newbie
Joined: Sep 2008
Posts: 6
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From: Louisville, Ky.
Year: 1989
Model: Cherokee
Engine: 4.0 I6
Definitely clean your throttle body and IAC. Buy a throttle body gasket, hard brissle tooth brush, and intake cleaner remove the throttle body to get it sparkling clean. Also remove and clean the IAC from the TB really good I would test the IAC to make sure it is working. (TEST IAC) Remove the intake boot from the TB and look down in the throttle body (the little port hole off to side of the main butterfly) have someone start up the Jeep and see it you can see the IAC pluger move in and out.
The glowing red exhaust is probably caused by a stopped up Catalytic Converter.
The glowing red exhaust is probably caused by a stopped up Catalytic Converter.
CF Veteran
Joined: Nov 2008
Posts: 7,874
Likes: 100
From: Northern Ontario, Canada
Year: 1990, 1999, 2000
Model: Cherokee
Engine: 4.0
remove your IAC motor and spray it clean with some brake cleaner.
if that doesn't work, you may have to replace it with one from a j/y.
if that doesn't work, you may have to replace it with one from a j/y.
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CF Veteran
Joined: Nov 2008
Posts: 6,989
Likes: 4
From: Oak Harbor, WA.
Year: 1987
Model: Cherokee
Engine: 4.0 liter RENIX I-6, DIY Cold Air Intake, 2.5 FM Exhaust, 3 Core Radiator
That Brake Cleaner will make her Pearly Whites spic and span....
Ditto on cleaning the IAC motor and bore. Read out your TPS to see if it's good and adjust if needed. Clean your whole Throttle Body. Carb. cleaner and a tooth brush is what I use. All the cleaners the guys have recommended will work just fine.
Ditto on cleaning the IAC motor and bore. Read out your TPS to see if it's good and adjust if needed. Clean your whole Throttle Body. Carb. cleaner and a tooth brush is what I use. All the cleaners the guys have recommended will work just fine.
Renix Super Guru
Joined: Mar 2008
Posts: 24,653
Likes: 19
From: In yourz postez fissin jurr spelinzs
Year: 1990XJ/1989MJ
Model: Comanche
Engine: 4.0L Renix
Buck and I agree again. Be very careful with that pintle on the IAC they bend easier than you might think. If they bend then you have to replace the IAC.
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Junior Member
Joined: Dec 2008
Posts: 40
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Year: 1987
Model: Cherokee
Engine: 4.0
well i set it right from a write up and it was set at .8 like it should i have no exhaust from the cat back. and im goin to clean the throttle body tomarrow and get a new iat and tps again just for kicks and 02 sensor, plust the radiator and resivor i have to replace anyway..
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