92 XJ, 4LHO, 270K (60K on motor), started experiencing stutter-step in
idle and planned on tune up. All of a sudden, from cold just as temp
starts to rise, no hesitation, no rough idle, just shuts down and won't
restart til cold. I did plugs, wires, cap, rotor, fuel filter this AM.
Started and ran fine right up to temp and through a 10-15 minute test
drive. Left alone for awhile, maybe 2 hours, started OK, but back to
shutdown as temp starts rising. Although, this time it restarts and will
run OK and shut off/on with ignition as long as temp doesn't get to
cold?????????? Help.

 

Hi Jeff,
Ninety nine percent of the time it will be the Crank Position
Sensor:
http://www.off-road.com/jeep/cheroke...tdcsensor.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

"Jeff D." wrote:
>
> 92 XJ, 4LHO, 270K (60K on motor), started experiencing stutter-step in
> idle and planned on tune up. All of a sudden, from cold just as temp
> starts to rise, no hesitation, no rough idle, just shuts down and won't
> restart til cold. I did plugs, wires, cap, rotor, fuel filter this AM.
> Started and ran fine right up to temp and through a 10-15 minute test
> drive. Left alone for awhile, maybe 2 hours, started OK, but back to
> shutdown as temp starts rising. Although, this time it restarts and will
> run OK and shut off/on with ignition as long as temp doesn't get to
> cold?????????? Help.

 

Hi Jeff,
Ninety nine percent of the time it will be the Crank Position
Sensor:
http://www.off-road.com/jeep/cheroke...tdcsensor.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

"Jeff D." wrote:
>
> 92 XJ, 4LHO, 270K (60K on motor), started experiencing stutter-step in
> idle and planned on tune up. All of a sudden, from cold just as temp
> starts to rise, no hesitation, no rough idle, just shuts down and won't
> restart til cold. I did plugs, wires, cap, rotor, fuel filter this AM.
> Started and ran fine right up to temp and through a 10-15 minute test
> drive. Left alone for awhile, maybe 2 hours, started OK, but back to
> shutdown as temp starts rising. Although, this time it restarts and will
> run OK and shut off/on with ignition as long as temp doesn't get to
> cold?????????? Help.

 

Hi Jeff,
Ninety nine percent of the time it will be the Crank Position
Sensor:
http://www.off-road.com/jeep/cheroke...tdcsensor.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

"Jeff D." wrote:
>
> 92 XJ, 4LHO, 270K (60K on motor), started experiencing stutter-step in
> idle and planned on tune up. All of a sudden, from cold just as temp
> starts to rise, no hesitation, no rough idle, just shuts down and won't
> restart til cold. I did plugs, wires, cap, rotor, fuel filter this AM.
> Started and ran fine right up to temp and through a 10-15 minute test
> drive. Left alone for awhile, maybe 2 hours, started OK, but back to
> shutdown as temp starts rising. Although, this time it restarts and will
> run OK and shut off/on with ignition as long as temp doesn't get to
> cold?????????? Help.

 

agreed, change it for 30.00
Just be careful not to drop the bolts inside, or you will have to pull the
tranny.
it is very hard to see.
use 3/8 extension about 6 to 10 inches and feel it good.
john
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:3FE7685A.12D51F91@***.net...
> Hi Jeff,
> Ninety nine percent of the time it will be the Crank Position
> Sensor:
> http://www.off-road.com/jeep/cheroke...tdcsensor.html
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> "Jeff D." wrote:
> >
> > 92 XJ, 4LHO, 270K (60K on motor), started experiencing stutter-step in
> > idle and planned on tune up. All of a sudden, from cold just as temp
> > starts to rise, no hesitation, no rough idle, just shuts down and won't
> > restart til cold. I did plugs, wires, cap, rotor, fuel filter this AM.
> > Started and ran fine right up to temp and through a 10-15 minute test
> > drive. Left alone for awhile, maybe 2 hours, started OK, but back to
> > shutdown as temp starts rising. Although, this time it restarts and will
> > run OK and shut off/on with ignition as long as temp doesn't get to
> > cold?????????? Help.

 

agreed, change it for 30.00
Just be careful not to drop the bolts inside, or you will have to pull the
tranny.
it is very hard to see.
use 3/8 extension about 6 to 10 inches and feel it good.
john
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:3FE7685A.12D51F91@***.net...
> Hi Jeff,
> Ninety nine percent of the time it will be the Crank Position
> Sensor:
> http://www.off-road.com/jeep/cheroke...tdcsensor.html
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> "Jeff D." wrote:
> >
> > 92 XJ, 4LHO, 270K (60K on motor), started experiencing stutter-step in
> > idle and planned on tune up. All of a sudden, from cold just as temp
> > starts to rise, no hesitation, no rough idle, just shuts down and won't
> > restart til cold. I did plugs, wires, cap, rotor, fuel filter this AM.
> > Started and ran fine right up to temp and through a 10-15 minute test
> > drive. Left alone for awhile, maybe 2 hours, started OK, but back to
> > shutdown as temp starts rising. Although, this time it restarts and will
> > run OK and shut off/on with ignition as long as temp doesn't get to
> > cold?????????? Help.

 

agreed, change it for 30.00
Just be careful not to drop the bolts inside, or you will have to pull the
tranny.
it is very hard to see.
use 3/8 extension about 6 to 10 inches and feel it good.
john
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:3FE7685A.12D51F91@***.net...
> Hi Jeff,
> Ninety nine percent of the time it will be the Crank Position
> Sensor:
> http://www.off-road.com/jeep/cheroke...tdcsensor.html
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> "Jeff D." wrote:
> >
> > 92 XJ, 4LHO, 270K (60K on motor), started experiencing stutter-step in
> > idle and planned on tune up. All of a sudden, from cold just as temp
> > starts to rise, no hesitation, no rough idle, just shuts down and won't
> > restart til cold. I did plugs, wires, cap, rotor, fuel filter this AM.
> > Started and ran fine right up to temp and through a 10-15 minute test
> > drive. Left alone for awhile, maybe 2 hours, started OK, but back to
> > shutdown as temp starts rising. Although, this time it restarts and will
> > run OK and shut off/on with ignition as long as temp doesn't get to
> > cold?????????? Help.

 

OK, sounds like something that happened to my '90 Cherokee a couple of years
ago. I replaced the O2 sensor (that always seems to be the culprit) and it
worked fine. However, your problem sounds more like a combination of a bad
O2 sensor and a short somewhere in the wiring from the O2 sensor. Too bad
most of our discussion group mechanics are on Holiday right now, or they
could have given you a quick accurate analysis.
"Jeff D." <jeff@fallingrockcentral.org.org.org> wrote in message
news:jeff-92795B.16260622122003@news06.east.earthlink.net...
> 92 XJ, 4LHO, 270K (60K on motor), started experiencing stutter-step in
> idle and planned on tune up. All of a sudden, from cold just as temp
> starts to rise, no hesitation, no rough idle, just shuts down and won't
> restart til cold. I did plugs, wires, cap, rotor, fuel filter this AM.
> Started and ran fine right up to temp and through a 10-15 minute test
> drive. Left alone for awhile, maybe 2 hours, started OK, but back to
> shutdown as temp starts rising. Although, this time it restarts and will
> run OK and shut off/on with ignition as long as temp doesn't get to
> cold?????????? Help.

 

OK, sounds like something that happened to my '90 Cherokee a couple of years
ago. I replaced the O2 sensor (that always seems to be the culprit) and it
worked fine. However, your problem sounds more like a combination of a bad
O2 sensor and a short somewhere in the wiring from the O2 sensor. Too bad
most of our discussion group mechanics are on Holiday right now, or they
could have given you a quick accurate analysis.
"Jeff D." <jeff@fallingrockcentral.org.org.org> wrote in message
news:jeff-92795B.16260622122003@news06.east.earthlink.net...
> 92 XJ, 4LHO, 270K (60K on motor), started experiencing stutter-step in
> idle and planned on tune up. All of a sudden, from cold just as temp
> starts to rise, no hesitation, no rough idle, just shuts down and won't
> restart til cold. I did plugs, wires, cap, rotor, fuel filter this AM.
> Started and ran fine right up to temp and through a 10-15 minute test
> drive. Left alone for awhile, maybe 2 hours, started OK, but back to
> shutdown as temp starts rising. Although, this time it restarts and will
> run OK and shut off/on with ignition as long as temp doesn't get to
> cold?????????? Help.

 

OK, sounds like something that happened to my '90 Cherokee a couple of years
ago. I replaced the O2 sensor (that always seems to be the culprit) and it
worked fine. However, your problem sounds more like a combination of a bad
O2 sensor and a short somewhere in the wiring from the O2 sensor. Too bad
most of our discussion group mechanics are on Holiday right now, or they
could have given you a quick accurate analysis.
"Jeff D." <jeff@fallingrockcentral.org.org.org> wrote in message
news:jeff-92795B.16260622122003@news06.east.earthlink.net...
> 92 XJ, 4LHO, 270K (60K on motor), started experiencing stutter-step in
> idle and planned on tune up. All of a sudden, from cold just as temp
> starts to rise, no hesitation, no rough idle, just shuts down and won't
> restart til cold. I did plugs, wires, cap, rotor, fuel filter this AM.
> Started and ran fine right up to temp and through a 10-15 minute test
> drive. Left alone for awhile, maybe 2 hours, started OK, but back to
> shutdown as temp starts rising. Although, this time it restarts and will
> run OK and shut off/on with ignition as long as temp doesn't get to
> cold?????????? Help.