Question about 2001 Jeep Cherokee

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Jeep will start but not idle when it's cold out

I have a 98 Jeep GC 5.9L sometimes if it's around 30 or below the car will start but will stall unless I keep on the throttle keeping the RPM's up. Once it gets to temp it's fine. The battery tested fine. This has been an off again on again problem for the last 2 yrs.

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  • loveall3 Jan 26, 2009

    Thanks for your input and I will try them both starting with cleaning the IAC. One question though, If it was the IAC or the cold start injector wouldnt it do it all the time not just sometimes? This happens about 2-3 times a week, then will be disappear for a month and come back. This has been going on for 2 yrs.

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Here is the most common cause of surges and stalls and low idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Posted on Jan 26, 2009

  • yadayada
    yadayada Jan 26, 2009

    this problem is much more pronounced in cold weather, I have fixed 100's of these idle issues from sludge build up, I have a similar engine (5.2L V8) in my Dakota, did the same thing as yours, this fixed the issue, had to clean a couple of times to get it to run without a cold stall. Note: U don't have a cold start injector, that was used on very early fuel injection setups, never on a dodge V8.

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You have a cold start injector. It basically primes the fuel into the engine.
It`s like the old type `choke` systems.
Get it checked at an auto electricians.

Posted on Jan 26, 2009

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2 Answers

Stalls after start up, Stalls when braking, then runs fine after a few minutes


Check the ECU engine temperature sensor. If it thinks the engine is hot, it will struggle to run when cold.

Mar 06, 2014 | Volkswagen Beetle Cars & Trucks

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Will not idle when cold


Its cold start issues:----
Go through the list of help links mentioned below:----

Click the link :----

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http://repairhelpcenter.blogspot.com/2012/10/cold-start-problem-and-vehicle-shudder.html
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http://repairhelpcenter.blogspot.com/2011/12/low-idle-when-cold-out-side.html
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http://technoanswers.blogspot.in/2012/02/ford-explorer-40-will-not-idle-when.html
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It can be issue with IAC( idle air control valve) causing the problem.


There are many other possibilities causing these idle issues. Engine idles rough.

There are few help links with solutions to troubleshoot such idle issues.

I suggest you refer the link below and follow its troubleshooting details:------

Click the link below:-----

Ford Expedition IAC valve replacing

http://technoanswers.blogspot.com/2012/12/ford-expedition-iac-valve-replacing.html

Bad miss at idle?

http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html

-----------

Stumbling and stalling at idle after engine rebuild?

http://schematicsdiagram.blogspot.in/2012/03/stumbling-and-stalling-at-idle-after.html

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1999 Ford F-150 Idles rough and quits when gas pedal is pressed less?

http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html

---------

Engine stumbles coming off idle when warm?

http://repairhelpcenter.blogspot.com/2012/01/engine-stumbles-coming-off-idle-when.html

------------------

Erratic idle on car?

http://schematicsdiagram.blogspot.com/2011/12/erratic-idle-on-car.html

-----------


Cold start problem and vehicle shudder around 2500 to 3500 rpms

http://repairhelpcenter.blogspot.com/2012/10/cold-start-problem-and-vehicle-shudder.html

----------

Low idle when cold out side?

http://repairhelpcenter.blogspot.com/2011/12/low-idle-when-cold-out-side.html

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GMC Sonoma Stalls and idles low

http://technoanswers.blogspot.com/2012/10/gmc-sonoma-stalls-and-idles-low.html

--------


GMC Idle Air Control (IAC) Valve Replacing?

http://schematicsdiagram.blogspot.com/2011/12/gmc-idle-air-control-iac-valve.html

-------------

1996 Camry intermittent engine failure while idle?

http://repairhelpcenter.blogspot.com/2011/10/1996-camry-intermittent-engine-failure.html

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http://repairhelpcenter.blogspot.com/2011/10/engine-quits-at-idle.html

-----------

Car overheats and Air blows hot at idle?

http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html

---------

High Idle Problem

http://repairhelpcenter.blogspot.com/2012/10/high-idle-problem.html

-------

While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

---------

Idle flair is noticed on car? Rough idle? car will not idle? Erratic idle speed?

http://technoanswers.blogspot.in/2012/02/idle-flair-is-noticed-on-car-rough-idle.html

--------

High rpm in neutral? Inconsistant high RPM in neutral?

http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html

-------

Vehicle stumbling at idle and shows code 54?

http://schematicsdiagram.blogspot.in/2012/03/vehicle-stumbling-at-idle-and-shows.html

----------

Rough idle, staling and Erratic shifting?

http://technoanswers.blogspot.in/2012/03/rough-idlestaling-and-erratic-shifting.html

-----------

While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

---------

These details will help.

Thanks.

Dec 14, 2012 | 1999 Jeep Wrangler

1 Answer

98 jeep GC limited, my jeep does not wont to stay crunk in the mornings when its cold outside i have to hold the gas down so the rpms run in 3000 till it finally keeps it self crunk. the altnator is good...


the iac ( idle air control ) needs cleaned or replaced. it controls the idling of vehicle. Also, try cleaning your throttle body. It's probably quite filthy. you can use carb cleaner to clean iac. but do not put body of iac in any liquid, just clean the valve on end. do not push it in they are preset for proper idle. have a good day !!

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