Idle motor issue - JeepForum.com
 
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post #1 of 8 Old 06-06-2013, 12:14 PM Thread Starter
LiveforXJ
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2001 XJ Cherokee 
 
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Location: Germanton
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Idle motor issue

Shop said my idle motor is bad, they estimated 200 for the fix, was wondering if it is easy to fix and if it's the same thing as an idle arm they have at the junk yard?

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post #2 of 8 Old 06-06-2013, 12:53 PM
Jeep_Tech
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idle motor is a idle air control motor aka iac. It comes off with 2 screws on side of the throttle body and is an $80 at autozone. Labor is less than 30 min.
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post #3 of 8 Old 06-06-2013, 01:25 PM
chriskeenan
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rockauto has them for 40-70$ http://www.rockauto.com/catalog/rafr...&parttype=6072 and summitracing http://www.summitracing.com/search/p...engine-type/l6

Its two small torx screws on the side of the throttle body and one electrical connector to remove it. Its right on top and probably one of the easiest things to change on the engine.

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post #4 of 8 Old 06-06-2013, 02:19 PM
Nick05
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before replacing, CLEAN IT. it might just save you money.
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post #5 of 8 Old 06-06-2013, 03:25 PM
cruiser54
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Quote:
Originally Posted by Nick05 View Post
before replacing, CLEAN IT. it might just save you money.
And here's how:



Courtesy of TJWalker:
--------------------------------------------------------------------
The Idle Air Control (IAC) is mounted on the back of the throttle body. (front for 87-90) The valve controls the idle speed of the engine by controlling the amount of air flowing through the air control passage. It consists of a stepper motor that moves a pintle shaped plunger in and out of the air control passage. When the valve plunger is moved in, the air control passage flows more air which raises the idle speed. When the valve plunger is moved out, the air control passage flows less air which lowers the idle speed. Over time and miles, the IAC can get carboned up which can have an adverse affect on idle quality. Cleaning the IAC may restore proper function and is an easy procedure to perform and good preventive maintenance so it is never a bad idea.

CLEANING THE JEEP 4.0 IDLE AIR CONTROL

Remove the air filter cover, associated hoses and the rubber boot that goes from the air filter cover to the throttle body. Remove the IAC with a torx driver (2 bolts; one can be kind of hard to get to)

“Gently” wiggle out the IAC from the throttle body. Gasket on the IAC can be re-used if it is not damaged

Clean the IAC with a spray can of throttle body cleaner; inexpensive and available at any place that sells auto parts. Throttle body cleaner is recommended rather than carburetor cleaner as it is less harsh, safe for throttle body coatings and is best for this task. Use cleaner, a rag and a toothbrush and or Q-Tips. Be gentle; don’t twist or pull on the pintle that protrudes from the IAC as it is fragile and you could damage it.

Thoroughly spray clean and flush where the IAC seats in the throttle body with the same spray cleaner

It is also a good idea to clean the entire throttle body itself, the butterfly valve inside of the throttle body and all associated linkage as long as you have things disassembled

If you own a Renix Jeep, you'll want to check this out.

An index to over 30 write-ups can be found in the link below

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My Jeep Technical Photos

http://www.cherokeeforum.com/g/album/1725214
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post #6 of 8 Old 07-09-2013, 09:14 AM
dgood
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Just finished doing this and it is amazing how much better it runs. Just by cleaning the IAC and the throttle body. Took about 45 minutes (it was pretty nasty down in there). Very easy! Thanks for the tip.
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post #7 of 8 Old 07-09-2013, 01:11 PM
cruiser54
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Quote:
Originally Posted by dgood View Post
Just finished doing this and it is amazing how much better it runs. Just by cleaning the IAC and the throttle body. Took about 45 minutes (it was pretty nasty down in there). Very easy! Thanks for the tip.
That cleaning is considered maintenance every 30,000 miles along with spark plugs, wires, cap and rotor. Glad you got it.

If you own a Renix Jeep, you'll want to check this out.

An index to over 30 write-ups can be found in the link below

www.cruiser54.com

My Jeep Technical Photos

http://www.cherokeeforum.com/g/album/1725214
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post #8 of 8 Old 07-09-2013, 06:24 PM
thedude30425
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If you think that was dirty, You should take off and clean your intake manifold.. I was replacing the header on mine so I hde to take it off and holy crap was there an insane amount of build up in there!
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