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Jeep Cherokee Start Stall Idle Problems

180 messages,  Last post on Nov 18, 2009 at 5:07 PM

You are in the Jeep Cherokee and Jeep Grand Cherokee Forum. Your Hosts are steve_ & tidester

What is this discussion about? Jeep Cherokee, Transmission, SUV


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#117 of 180
Re: 2000 Cherokee Rough Idle [volvoid] by volvoid
Apr 30, 2008 (6:12 am)
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Replying to: volvoid (Apr 17, 2008 5:42 am)

Follow-up: Guess nobody out there has any ideas. Tried a new battery based on earlier query. Not a bit of difference - just another $100 sunk into this worthless moneypit. Should never have sold my 1979 AMC Wagoneer. It may have gotten single-digit gas mileage, but even with today's prices, I could have been feeding it premium for what I've sunk on its Chrystless counterpart -- and enjoyed a more reliable, classy and comfortable vehicle, with engineering that one can actual work on when something goes wrong.
#118 of 180
Re: 2000 Cherokee Rough Idle [volvoid] by lunghd
Apr 30, 2008 (1:44 pm)
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Replying to: volvoid (Apr 30, 2008 6:12 am)

So many people tack on their vehicle's issues to one thread that sometimes their questions sometimes get lost. Sorry no one has helped ya! I'll go back & look for your questions. (And I agree that the AMC Waggy's were fantastic! Gimme a 401 and room for a twin mattress in the back!)
 
For the next person - unless ya are replying with a response / help to a previous post... it's time to start a new thread.
#119 of 180
Re: 2000 Cherokee Rough Idle [volvoid] by lunghd
Apr 30, 2008 (1:47 pm)
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Replying to: volvoid (Apr 17, 2008 5:42 am)

Only does this when you have the brake applied??? Check the brake booster hose, or the booster itself for a vacuum leak.
#120 of 180
FOUND THE PROBLEM! Stalling !!!!!!!!! by papen
May 01, 2008 (8:03 am)
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Brought my stalling Jeep 2006 (53,700 miles) into Jeep where they repaired the computer in 2006. Since then had loads of problems. Jeep running for twenty minutes when cooled down would start again. This has gone on for two years with jeeps comment; "We aren't getting this to stall". When they checked it out all seemed okay on the computer.
Took it to get worked on (not Jeep) and they replaced the cam sensor and crank sensor then sent off the computer to be rebuilt ! Cost 350.00. They found 6 faults on the computer!!!!!!! The location of the computer was down below hoses to where leaks would affect the computer. Real close to the hoses from the radiator.
What made the mechanic get the idea of rebuilding the computer was the ) meter reading that everything checked out okay. As I said they found 6 faults on the computer just placed in in 2006.
The Jeep is running fine. Hasn't stalled once! Hope this helps? It has been a headache for two years and Jeep claiming everything fine. No lights on dash board, Jeep running.
#121 of 180
Re: 2000 Cherokee Rough Idle [lunghd] by volvoid
May 01, 2008 (9:40 am)
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Replying to: lunghd (Apr 30, 2008 1:47 pm)

thanks for the idea - - not sure if it's only when brake is applied, but will check tonight -- that could explain why mechanics don't replicate it and computer is clueless. I've suspected vacumn leak but couldn't locate one -- this will help me narrow down suspects. Guess I need someone to apply brake while I listen?
#122 of 180
Re: 2000 Cherokee Rough Idle [volvoid] by lunghd
May 01, 2008 (12:55 pm)
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Replying to: volvoid (May 01, 2008 9:40 am)

I don't know if you could hear the leak but it's worth a shot. The hard vacuum line cannot be replaced with anything other than a vacuum hose so swapping w/ heater hose etc won't work. (The vacuum will collapse it.)
 
The vacuum leak idea is just a shot but another forum I'm on has had people report leaks in the brake booster / hose as a cause of intermittent stumbling.
 
HTH
#123 of 180
Re: 2000 Cherokee Rough Idle [lunghd] by volvoid
May 02, 2008 (12:12 pm)
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Replying to: lunghd (May 01, 2008 12:55 pm)

idle wanders whether brake is on or not -- doesn't mean that's not the culprit, but less of a smoking gun. Will check more this weekend. thanks again.
#124 of 180
Re: 2000 Cherokee Rough Idle [volvoid] by lunghd
May 02, 2008 (5:53 pm)
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Replying to: volvoid (May 02, 2008 12:12 pm)

A common (on older XJ's) problem is for the intake/exhaust manifold bolt's & studs to come loose due to heat cycling & vibration. You can check for that with a squirt bottle (an old windex bottle, etc) filled with water & set to stream. When the motor is misbehaving squirt along the head to manifold surfaces. A temporary change in idle - ie, it smooths out... will help you pinpoint the suspected leak area.
 
If they are loose - do NOT OVERTIGHTEN! The studs are especially prone to snapping off & they all get 23 ft/lbs., if I recall correctly. (At least on my 4.0L.) I have the torque values etc on my site on this page:
INTAKE ? EXHAUST MANIFOLD TORQUE VALUES & TIGHTENING SEQUENCE
 
This page is for the older RENIX XJ's but other than some head port changes & HO exhausts not having the EGR tubing it should (SHOULD) be the same for all year 4.0L's.
#125 of 180
89 Jeep Cherokee Morning Start by neil693
Jun 16, 2008 (5:23 am)
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I have a 89 Jeep Cherokee Pioneer. I park it on the grass and in the morning it doesn't start. I just all the caps, plugs, wires, and filters changed out. It still won't start. When I come home mid-day it starts right up. What else could be the problem?
#126 of 180
Re: 89 Jeep Cherokee Morning Start [neil693] by lunghd
Jun 16, 2008 (7:53 am)
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Replying to: neil693 (Jun 16, 2008 5:23 am)

Allergies?
 
Next time it doesn't start up - lift the hood & unplug then replug the Crankshaft Position Sensor connector. (Back of head, driver side on US models, wire runs from harness to nearly hidden sensor on upper area of bell housing - diagram on my website.)
 
Failing Crank sensors are a very, very common issue & often are intermittent until they finally crap out entirely. Connector is probably oxidized & morning moisture is causing enough extra resistance to prevent signal pulse from reaching computer.
 
Give it a try & let us know how it goes.

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