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Engine stalls after warm-up

Tiny
CHRIS627
  • MEMBER
  • 12 POSTS
I spent some time checking all the connections that around the coil rail. Everything appears to be mechanically sound. I then replaced the spark plugs with the OEM plugs, double checked the gap before installing, all was good. I figured that before this nightmare started, it was on my to do list anyway. Guess what happened next? The motor turns over but will not start. The starter fluid down the intake made no difference. What do you thinK?
Thanks for your help.
Chris
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Thursday, January 1st, 2009 AT 4:30 PM
Tiny
JNOVACK
  • MECHANIC
  • 723 POSTS
Ok go to parts store and get a test pug there about $2.00 and test for spark also make sure the wires are going to the wright plugs it is esy to put on wrong way
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Friday, January 2nd, 2009 AT 9:43 AM
Tiny
LONGDAYAHEAD
  • MEMBER
  • 14 POSTS
Replace the timing chain and gears.
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Sunday, January 4th, 2009 AT 8:51 PM
Tiny
RPLUCKNETT
  • MEMBER
  • 1 POST
  • 2000 JEEP CHEROKEE
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 100,000 MILES
While driving at speeds up to 40 MPH or idling at traffic lights our engine will cut off. It idles at 800 RPM and will shut off or when driving at 2000+ RPM it shuts off. Sometimes it takes a day or more before the problem reoccurs but it eventually does. This has been going on for 3 months and our repair shop cannot solve it and cannot find the problem even after extensive diagnostic tests.
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-1
Monday, April 29th, 2019 AT 6:03 PM (Merged)
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Was the ASD relay and crank sensor checked and or replaced?
Can you restart right after it stalls or it take time for you to restart it back
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Monday, April 29th, 2019 AT 6:03 PM (Merged)
Tiny
FOGGYSHERWIN
  • MEMBER
  • 2 POSTS
I have the same issue and am currently stranded where we were supposed to be on vacation. It takes a lot of coaxing to get it to start again.
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-1
Monday, April 29th, 2019 AT 6:03 PM (Merged)
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,895 POSTS
When the engine stalls can you hear the fuel pump in the tank? Here is a guide to help us see what is going on:

https://www.2carpros.com/articles/car-cranks-but-wont-start

Please run down this guide and report back.

Cheers, Ken
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Monday, April 29th, 2019 AT 6:03 PM (Merged)
Tiny
JPFITCH
  • MEMBER
  • 12 POSTS
  • 2000 JEEP CHEROKEE
  • 147,000 MILES
I have a 2000 Jeep Grand Cherokee. While driving the engine just stops, have changed fuel filter hoping this might fix it. It didn't. Any advise for troubleshooting?
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Monday, April 29th, 2019 AT 6:03 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Check fuel pressure to verify pressure.
If that is ok, crank sensor may be failing and needs to be verified by someone with a scan tool.

Roy
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Monday, April 29th, 2019 AT 6:03 PM (Merged)
Tiny
FOGGYSHERWIN
  • MEMBER
  • 2 POSTS
I will go through this and report back. No noise accompanies the shut off. Just a complete stop, then the power steering shuts down and I have had trouble with the brakes not wanting to respond as I coast the Jeep into a parking lot. It is also the only time the check engine light goes on.
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Monday, April 29th, 2019 AT 6:03 PM (Merged)
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
I've seen this cherokee issue many times

I'm w/ you, asemaster6371, on the crank sensor theory

The cool thing is they're not real expensive....i looked up this one for a 2000 grand cherokee 4.7l

Http://www.autozone.com/autozone/parts/duralast-crankshaft-position-sensor/2000-jeep-grand-cherokee-4wd/_/n-je9nmz9gslr?itemidentifier=263999_0_0_

My buddy now keeps a spare one in his rig, this has happened to him twice....the 1st time, the dealer replaced it (whether the oem part was the problem is not known) one of his friends replaced it the 2nd time. He's now running on an aftermarket one.

Keep us informed on progress

The medic
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Monday, April 29th, 2019 AT 6:03 PM (Merged)
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,895 POSTS
This sounds like the crankshaft angle sensor has gone bad. Lets run the codes to see if anything comes up.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please run down these guides and report back.

Cheers, Ken
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Monday, April 29th, 2019 AT 6:03 PM (Merged)
Tiny
JPFITCH
  • MEMBER
  • 12 POSTS
What type of scan tool do I need and does have to be attached to the jeep or the crank sensor/
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Monday, April 29th, 2019 AT 6:03 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
A real scan tool, not a code reader. It plugs into the car but unless you have about 2500 or maybe you have a scan tool. Let a shop with the tool check it for you.

Roy
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Monday, April 29th, 2019 AT 6:03 PM (Merged)
Tiny
JPFITCH
  • MEMBER
  • 12 POSTS
Will try this
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Monday, April 29th, 2019 AT 6:03 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good luck
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Monday, April 29th, 2019 AT 6:03 PM (Merged)
Tiny
JPFITCH
  • MEMBER
  • 12 POSTS
Got the sensor out, but lost the bolt somewhere in the jeep. Can anyone tell me how big this bolt is so I can go buy another one?
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Monday, April 29th, 2019 AT 6:03 PM (Merged)
Tiny
ALLPRO
  • MECHANIC
  • 48 POSTS
The bolts that hold the crank sensor in place on that specific jeep are a dealer item only. Its a specific shouldered bolt that you wont find at a hardware. If you ise the wrong bolt you will damage the new sensor.
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Monday, April 29th, 2019 AT 6:03 PM (Merged)
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
Other possibilities you might have are a auto salvage yard or maybe an engine machine shop

I doubt any one of the three will "break you"---it's a matter of the time/trouble it will take to get one.

I would be jumping up and down on the bumper/ shining a flashlight everywhere/ shoving a telescopic magnet in every hole/ buying ice cream for the neighbor kid with little hands. With even a larger reward should they find it!

The medic
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Monday, April 29th, 2019 AT 6:03 PM (Merged)
Tiny
JPFITCH
  • MEMBER
  • 12 POSTS
Thank you all for all the help. After finally getting the crank sensor installed, had to purchase a new battery, and ended up changing the fuel pump after all. By the way, the bolt for the crank sensor did not come from a dealer. Come from an auto parts store. Thanks for all the help.
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Monday, April 29th, 2019 AT 6:03 PM (Merged)

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