Engine stalls intermittently while driving?

Tiny
SCHNEIDER09
  • MEMBER
  • 2 POSTS
  • 2002 JEEP CHEROKEE
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 86,000 MILES
Engine stalls at operating temp.
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Friday, October 16th, 2020 AT 12:17 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Has the check engine light come on? HAve you checked for vacuum leaks, fuel pump pressure? Does the car start back up for you when this happens?

Let me know.
Joe
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Friday, October 16th, 2020 AT 12:17 PM (Merged)
Tiny
SCHNEIDER09
  • MEMBER
  • 2 POSTS
The transmission control relay gets hot, when it cools it clicks then the engine will start. The relay is fine I checked it, I'm guessing there is a short somewhere but I am stumped trying to find what is conected to that cuircit. This all started after I replaced the battery.
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Friday, October 16th, 2020 AT 12:17 PM (Merged)
Tiny
AZCHEROKEE
  • MEMBER
  • 1 POST
  • 2001 JEEP CHEROKEE
  • 4.0L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 192,000 MILES
Engine problem started with some sputtering at highway speed sometimes stalling. Pulled engine codes p1391 p0460 p0340 p0351. Due to this have replaced crank position sensor cam position sensor coil pack spark plugs and the tps sensor. Engine starts and idles fine and drives ok but now dies after I go wide open throttle from 1st into 2nd and letting off throttle.
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Friday, October 16th, 2020 AT 12:18 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Do a wiggle test on crank and cam sensors. It may be a bad harness there or poor connections at either end. 351 may be a bad coil so check resistance see If it's ok and check dark green/orange wire to see how much voltage is going there. However a the asd relay must be activated when doing this test so a pro should do it. It can also be a bad connection. The code 460 might be a bad fuel sending unit. As this is a 4.0 some of these wore through harness at the rear stud on head and cause it to ground out so check there if it is worn through if it is repair with connectors, solder and shrink tube.
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Friday, October 16th, 2020 AT 12:18 PM (Merged)
Tiny
BULL146
  • MEMBER
  • 1 POST
  • 2001 JEEP CHEROKEE
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 98,000 MILES
I have a 2001 grand cherokee. I be driving down the raod and it will die out sometimes it will start right back up others times it wont. I put new plugs and fuel filter on it. The last time it dies I check to see if it had pressure on the fuel rail with my finger and it did. Sometimes it will jerk as you are going but wont die out and then be fine. Any ideas? One day my wife drove in morning and it was fine an hour later it wouldnt start just crank then 3 hrs later started right up and ran fine for a few days.
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Friday, October 16th, 2020 AT 12:19 PM (Merged)
Tiny
SHANNON8912
  • MEMBER
  • 2 POSTS
Change the Crank Sensor. This should solve this problem. I had the same exact problem with my Jeep Grand Cherokee Laredo. I talked to several area mechanics and they all agreed to change the crank sensor so that's what I did. So far so good been 3 months now with no stalling.
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+2
Friday, October 16th, 2020 AT 12:19 PM (Merged)
Tiny
HADLEY89
  • MEMBER
  • 1 POST
  • 2001 JEEP CHEROKEE
  • V6
  • 4WD
  • AUTOMATIC
  • 181,000 MILES
At first I had problems with my jeep over heating. Drove it to auto-zone told us it was the water pump. So we replaced it. Drove fine for two days. Took it to a repair shop told us the thermostat was put in wrong cost us $80 to replace it. Drove fine for another two days. Now the car shakes and at times wont pick up speed fast enough and stalls on us. Last time I drove it and it stalled it took 15 times to get it started again and I wasn't to far from home thank goodness and drove it back. Even before when we were having the over heating problem is would have this hissing screeching noise like that of an old camera flash like the noise they use in the Texas chainsaw massacre movies. It will start right up. I'm afraid to drive it to a place to check for any codes because I'm afraid I wont make it there. I only drove a block away last time I drove it. Please help. What could be wrong with it. Oh the transmission fluid is fine. We drained all the oil that was in it and replaced it, but it still doesn't look like good oil, its not as bad as it looked but still not super clear, still a little brown. Can someone please tell me wheat's the difference between just a Cherokee or a grand Cherokee
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Friday, October 16th, 2020 AT 12:19 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
The grand Cherokee is more deluxe. Unfortunately you'll have to scan for codes and check fuel pressure with agauge. Auto parts rent it. Then have coolant system pressure checked for an internal lek like a head gasket also check for vacuum leaks like a line off/broken etc. Another thing never believe what an auto parts guy tells you as they have no experience fixing cars they are guessing like you are.
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Friday, October 16th, 2020 AT 12:20 PM (Merged)
Tiny
RZUROVEC
  • MEMBER
  • 1 POST
  • 2001 JEEP CHEROKEE
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 145,000 MILES
My Jeep Grande Cherokee dies while I am driving. I just picked up my car today from the mechanic. They did some transmission repairs. The torque convertor was bad. I was told a bad torque convertor could cause the car to die. Well that did not fix the problem. The car again died out while I was turning into my office parking lot. Any ideas on what could cause this. An additional note - we recently replaced the radiator, water pump, and battery.
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Friday, October 16th, 2020 AT 12:20 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
If the engine condition is in top shape it leaves fuel and spark as the problem could be both at the same time.

Turn the ignition on -do you hear the fuel pump?-If not check fuse and fuel pump relay. Fuel pump comes on-do a fuel pressure test and report back your readings so I can further evaluate the fuel system.
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Friday, October 16th, 2020 AT 12:20 PM (Merged)
Tiny
RAY5796
  • MEMBER
  • 6 POSTS
  • 2001 JEEP CHEROKEE
  • V8
  • 2WD
  • AUTOMATIC
  • 148,000 MILES
I have a 2001 Jeep Grand Cherokee with a 4.7 liter V8 and 148,000 miles. Towards the beginning of this year, the Jeep developed a problem where it will stall as I come to a stop. It doesn't do it all of the time, but it is becoming more frequent. I previously read that this problem may be due to a faulty camshaft position sensor or even the crankshaft position sensor. I've replaced both sensors, but the problem remains. The vehicle does start back up once it has stalled, but sometimes it takes a few attempts. I initially thought it may be temperature dependent, but it happens regardless of cold or hot ambient conditions. I receive no check engine light when it stalls. Your help is greatly appreciated.
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Friday, October 16th, 2020 AT 12:20 PM (Merged)
Tiny
ANIMALFARM
  • MEMBER
  • 58 POSTS
Pull the trouble codes from the engine computer using the "check engine light" Self-Diagnostic method. This will at least give you a guide as to what may be causing the problem. I'm going to "cut/past" how I do it from another post I answered, and unless Jeep has changed the procedure it should still work. I DO recommend getting a HAYNES repair manual from the local parts store for YOUR model, look in the Emission and Engine Control System chapter and read the procedure in that manual for you. Has lots of info. Anyway, this is how I do it, hope it applies to your model:

I have a 1996 Jeep Cherokee that will do this when I do an on/off sequence using the key, but only if your check engine light is working.
To do this, turn the ignition key ON, OFF, ON, OFF, then finally ON. (On is the position just before that extra click that starts the jeep) The check engine light will blink the number of the first code digit(count the number of flashes), then pause about 2 seconds and blink the number of the second code digit. If you have more than one error code, the light will pause about 3 or 4 seconds, then blink the first and second digits of that code the same way as before. When the computer is finished blinking "codes". It will flash 5 times, pause, then flash 5 more times to tell you that is the end of the sequence. Post back with what you find out, and someone should be able to answer with more info if you need it. GOOD LUCK!
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Friday, October 16th, 2020 AT 12:20 PM (Merged)
Tiny
RAY5796
  • MEMBER
  • 6 POSTS
The Haynes repair manual for my Jeep says the procedure for diagnostic mode is for 1997 and earlier models only. 1998 and later models must have the diagnostic trouble codes extracted using a specialized scan tool. In any case, the manual also says that the PCM will illuminate the check engine or malfunciton indicator lamp when it recognizes a fault in the system and wil remain illuminated until the code is cleared or the PCM no longer detects a malfunction after several consectutive drive cycles. My check engine light has never illuminated during the engine stalling which implies that there are no trouble codes to extract. If no trouble codes exist, what's the next step?
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Friday, October 16th, 2020 AT 12:20 PM (Merged)
Tiny
ANIMALFARM
  • MEMBER
  • 58 POSTS
Or it could imply that your check engine light is burned out (it's possible, it's possible.). If you have an Autozone in your area, they will come out with a hand-held scanner and read your OBDII codes for FREE, FREE, FREE! Other places do it, too, just call around. If doing this is possible, try it. Better to have too much info than not enough.
Now, heading back to non-electronic causes, how's your fuel filter? Plugged/dirty? Had a tune up recently?
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Friday, October 16th, 2020 AT 12:20 PM (Merged)
Tiny
RAY5796
  • MEMBER
  • 6 POSTS
No codes are present (I took the Jeep to AutoZone and had them check for codes). In regards to a tune-up; I've had the injectors cleaned, new spark plugs, new air filter and an oil change with new oil filter. I was also told that if the problem was the fuel filter, I would have problems while at highway speeds or while accelerating (especially during hard acceleration), but not while idling or coasting to a stop. I'm really not sure what to check next. Your help / advice is very much appreciated.
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Friday, October 16th, 2020 AT 12:20 PM (Merged)
Tiny
JNOVACK
  • MECHANIC
  • 723 POSTS
Ok check your fuel pressure at an idle and at higher rpm it should not be less then 44.2 psi
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Friday, October 16th, 2020 AT 12:20 PM (Merged)
Tiny
EPNFRN
  • MEMBER
  • 2 POSTS
Ray5796 -- please keep me informed of your progress. My wife's 2001 with the V8 (and 90k miles) has just started doing this off and on. Also unable to get a code or rhyme or reason!

Thank you,
brian
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Friday, October 16th, 2020 AT 12:20 PM (Merged)
Tiny
JNOVACK
  • MECHANIC
  • 723 POSTS
Also test the Throttle Position Sensor
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Friday, October 16th, 2020 AT 12:20 PM (Merged)
Tiny
RAY5796
  • MEMBER
  • 6 POSTS
Problem Fixed! It turned out to be the Fuel Filter/Pressure Regulator (all one piece). It was intermittently failing to maintain sufficient pressure during coast down. It was $29.99 at AutoZone and wasn't too terrible to remove / install. Thanks to all those who provided advice.
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Friday, October 16th, 2020 AT 12:20 PM (Merged)

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