2000 Jeep grand Cherokee 4.7 L stalling intermittently - Jeep Garage - Jeep Forum

Go Back   Jeep Garage - Jeep Forum > Jeep Technical Discussion > Troubleshooting/Problems Discussion

Reply
 
Thread Tools Display Modes
 
  #1  
Old 07-31-2015, 05:22 PM
Member
 
Join Date: Jul 2012
Posts: 29
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1825
RLM67 is on a distinguished road
2000 Jeep grand Cherokee 4.7 L stalling intermittently

I have a 2000 WJ grand Cherokee 4.7, with 277,000 miles – – having an issue with it stalling, engine losing power at both low speeds, and today at freeway speeds. After researching the problem, I cleaned the intake actuator valve, and that seemed to help – – a more stable idle. Today on the way to work, I had it on cruise control at 65 mph, I felt a slight engine surge – – almost as though the transmission was slipping – – but no increase in RPMs and the engine started to die. I coasted off the freeway, and restarted the engine right away. Traveled another 30 miles to work, and had no issues. I am scratching my head on this one. Fuel pump? Vacuum issue?


Sent from my iPhone using JeepGarage

Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old 07-31-2015, 05:28 PM
Member
 
Join Date: Jul 2012
Posts: 29
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1825
RLM67 is on a distinguished road
Re: 2000 Jeep grand Cherokee 4.7 L stalling intermittently

Additionally, when I did the "key dance" to possibly retrieve an error code, it displayed nothing.


Sent from my iPhone using JeepGarage
Reply With Quote
  #3  
Old 07-31-2015, 08:53 PM
Frango100's Avatar
The beast from Brazil

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 7,614
Thanks: 23
Thanked 423 Times in 408 Posts
Rep Power: 529934
Frango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond repute
Re: 2000 Jeep grand Cherokee 4.7 L stalling intermittently

I would put my bet on the crank sensor.
__________________
Frank

JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
KYB Gas-a-Just shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old 08-01-2015, 05:06 PM
Member
 
Join Date: Jul 2012
Posts: 29
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1825
RLM67 is on a distinguished road
Re: 2000 Jeep grand Cherokee 4.7 L stalling intermittently

Just for clarity, this is the crankshaft position sensor located behind the starter on the engine block? If so, that makes sense. I replaced it before for similar symptoms. Luckily an expensive solution.


Sent from my iPhone using JeepGarage
Reply With Quote
  #5  
Old 08-01-2015, 05:23 PM
Frango100's Avatar
The beast from Brazil

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 7,614
Thanks: 23
Thanked 423 Times in 408 Posts
Rep Power: 529934
Frango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond repute
Re: 2000 Jeep grand Cherokee 4.7 L stalling intermittently

Yes, the crankshaft position sensor behind the starter motor.
__________________
Frank

JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
KYB Gas-a-Just shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
  #6  
Old 08-09-2015, 10:45 AM
Member
 
Join Date: Jul 2012
Posts: 29
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1825
RLM67 is on a distinguished road
Re: 2000 Jeep grand Cherokee 4.7 L stalling intermittently

Replaced the crankshaft position sensor, and it resulted in a more stable Idle. However, it died again yesterday, last night I was driving on the freeway, it started to die and then recovered – – and then the fuel light came on and the display showed that I had 0 miles to empty even though I had about 36 miles to empty. Got to the gas station, turned the Jeep off, and then turned it back on and the display showed that I had about 30 miles to empty. Could this be an issue with a relay failing? Fuel pump? Fuel tank sensor – – if there is one? Scratching my head on this one.


Sent from my iPhone using JeepGarage
Reply With Quote
  #7  
Old 08-09-2015, 12:05 PM
Frango100's Avatar
The beast from Brazil

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 7,614
Thanks: 23
Thanked 423 Times in 408 Posts
Rep Power: 529934
Frango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond repute
Re: 2000 Jeep grand Cherokee 4.7 L stalling intermittently

Where the fuel level indicator and the voltage indicator working normally? Several things can be wrong, but a shorting sensor can bring down the PCI bus and shut down the engine, and bring the fuel and volt indication to 0.
It could be a wiring problem as well. If a wire shaves against some metal part, it can short out temporarely.
__________________
Frank

JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
KYB Gas-a-Just shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
  #8  
Old 08-09-2015, 01:37 PM
Member
 
Join Date: Jul 2012
Posts: 29
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1825
RLM67 is on a distinguished road
Re: 2000 Jeep grand Cherokee 4.7 L stalling intermittently

Fuel & voltage indicators are working normally. When the engine died/recovered last night, the instrument panel lit up--the low fuel light stayed on and the fuel gauge dropped to empty, overhead display read "0 miles to empty" even though I knew I had at least 30 miles or so to empty. Traveled another 7 miles to a gas station, simply turned off the Jeep and then turned key to "accessories" and fuel indicator and "miles to empty" display returned to normal, reading about 34 miles. Am I looking for damaged/ shaved wiring in the engine compartment first? On an unrelated note, what is generally a normal operating temperature for a Jeep GC with 278k miles? Mine runs about 210 and creeps up a bit while sitting in freeway traffic--temps here in Houston have been hitting 102 frequently.


Sent from my iPhone using JeepGarage
Reply With Quote
  #9  
Old 08-09-2015, 05:44 PM
Frango100's Avatar
The beast from Brazil

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 7,614
Thanks: 23
Thanked 423 Times in 408 Posts
Rep Power: 529934
Frango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond repute
Re: 2000 Jeep grand Cherokee 4.7 L stalling intermittently

I believe that 210 is a normal operating temperature.
That the fuel indicator goes to empty, the low fuel light comes on and the EVIC shows 0 miles to empty, is a sign that the PCI bus is not working correctly. Can be a short in the PCI bus, a faulty PCM or one of the PCM sensors shorting out the 5V supply.
You say fuel and voltage are working normally, but i ment to say, when the problem is there. because when the problem is there, the fuel indication is not normal and most probably the voltage as well, eventhough this can be for a short moment. I would indeed check all the wirebundles under the hood and especially where they run close to metal parts.
__________________
Frank

JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
KYB Gas-a-Just shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
  #10  
Old 08-09-2015, 08:14 PM
Member
 
Join Date: Jul 2012
Posts: 29
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1825
RLM67 is on a distinguished road
Re: 2000 Jeep grand Cherokee 4.7 L stalling intermittently

Checked all of the wiring, only found two spots where the old wrapping was coming off, though the insulation was intact and they were very close to other metal parts. Also checked all of the PCMs, relays, re-wrapped the wiring--didn't see anything unusual. I'll keep an eye on it. Thanks for your help thus far.


Sent from my iPhone using JeepGarage
Reply With Quote
  #11  
Old 08-10-2015, 05:02 PM
Member
 
Join Date: Jul 2012
Posts: 29
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1825
RLM67 is on a distinguished road
Re: 2000 Jeep grand Cherokee 4.7 L stalling intermittently

It's stalled on me again today on the freeway – – this time I noticed that both the RPM and the speedometer both fell straight to zero, even though I was cruising down the freeway at about 70 mph. I'm going to crack open the Chilton manual as soon as I get home, to see if I can diagnose this. I'm guessing A relay or PCM could be the culprit.


Sent from my iPhone using JeepGarage
Reply With Quote
  #12  
Old 08-10-2015, 05:40 PM
Frango100's Avatar
The beast from Brazil

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 7,614
Thanks: 23
Thanked 423 Times in 408 Posts
Rep Power: 529934
Frango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond repute
Re: 2000 Jeep grand Cherokee 4.7 L stalling intermittently

Speedo, tacho, fuel level and voltage indications all come from the PCM. Speedo, the PCM receives from the ABS control module and rpm from the crank position sensor. As told before, all these informations travel via the PCI data bus from the PCM to the instrument panel. The fault could be the PCM, a short in the PCI data bus or one of the sensors shorted, which input to the PCM.
I would try with running engine to wiggle all the wire bundles under the hood and see if the engine will stall. Stay clear from accessory belt and cooling fan and don΄t wear loose clotches, which can be caught by the moving parts. If the problem is for sure not wiring related, then the following sensors are suspect: cam sensor, crank sensor (which you already changed), MAP sensor and TPS sensor. All these sensors use a 5V reference from the PCM and when one of these sensors shorts this 5V reference out, you get problems as you have now.
Finally can be the PCM itself.
__________________
Frank

JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
KYB Gas-a-Just shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
Reply

Tags
grand cherokee, jeep

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
2000 GC 4.7 stalling donken Troubleshooting/Problems 8 12-21-2014 04:52 AM
2000 Jeep Grand Cherokee Stalling dr300yards Troubleshooting/Problems Discussion 1 06-13-2013 01:44 AM
Power Window (Fronts) issue – goes down by itself intermittently rdlarado10 Troubleshooting/Problems 11 07-13-2012 07:23 AM
Radio intermittently uses only one speaker JujuB Trouble Shooting/Problems/Service 3 06-01-2011 10:05 AM

» Premium Vendor Showcase
Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 07:09 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community

JeepGarage.org is in no way associated with or endorsed by FCA US LLC. Chrysler, Dodge, Jeep, Ram, Mopar and SRT are registered trademarks of FCA US LLC.