I recently purchased a 1997 Cherokee, 4.0. I drove it around town and on the highway and it ran great. I work at the post office as a rural mail carrier. When I went to deliver the mail after about 60 mailboxes it died. After
sitting for about 30 minutes it started right up. I delivered about 30 more boxes it died again. I had somebody else finish. I drove it home and ran numerous errands and it ran great. The following day was a repeat of the first day. It's driving me crazy.

Please Help,
Zack:screwy:

I recently purchased a 1997 Cherokee, 4.0. I drove it around town and on the highway and it ran great. I work at the post office as a rural mail carrier. When I went to deliver the mail after about 60 mailboxes it died. After
sitting for about 30 minutes it started right up. I delivered about 30 more boxes it died again. I had somebody else finish. I drove it home and ran numerous errands and it ran great. The following day was a repeat of the first day. It's driving me crazy.

Please Help,
Zack:screwy:


May be like a old work horse does better on the road home or after work.
When it quits you need to check for lose of spark or fuel.
Get it on a scanner and check for codes and run a fuel pressure test.
If any codes past or present post back code no.
They have a lot of crank shaft sensor problems but other problems to..
MT

Had the same thing with a family car, turned out to be a bad ignition module in distributer. Car would quit when it got warm then start back up when car cooled down.

Could possibly be a clogged or obstructed fuel filter...Which if memory serves me right(sometimes it don't:grinno: )it's in the fuel tank:uhoh:

Sounds a bit like Crankshaft Position Sensor to me.

Sounds like a CPS problem to me also. When they get hot they crap out. Cool down and they're good for awhile. Jeep must make alot of money of them things since I replaced mine and what a difference it makes. They are also made to withstand water and corrosion at the connections. Follow the lead from the CPS and disconnect it and take a look for green or a nice aqua blue build up. When I replaced mine had to take a toothbrush with lectro-clean. Made them sparkle and then filled it with dielectric grease to prevent this. Mines a 2000 so for 97 don't rule it out. Hell I'd change mine every 4-5 years as part of a tune-up after what I read and saw---Good luck and get back as to what you have found so others can add to the list of things to be done so Jeeps don't pis ya off more than they have 2--------Chris

Hi All,
Thanks for all the advice.
I changed the CPS and took the Jeep to work and it ran fine.

Zack:grinyes: