1. #1
    jcianciolo's Avatar
    jcianciolo is offline Junior Member
    Join Date
    Nov 2010
    Posts
    9

    1998 Jeep Cherokee Sport Shuts off While Idle/Driving

    Last week my 1998 Jeep Cherokee Sport 4.0L inline 6 cyl started to shut off on me for no apparent reason. It first started while idled at a stop light. I started it right back up with no problem. About 30 seconds later same thing, stalled again. This time it would not start right away. Brand new battery and idle air control valve so it was turning over just fine. After a few minutes of trying it finally started again. I blew through the red light thinking I would jump start a clogged fuel filter or something. While driving at about 50-60 mph, it shut off again. This time it would start back up. After about 30 minutes I had tried everything. The last thing I tried was turning off all power drains, like the radio and heater and it started right back up. This was probably just coincidence, but I figure it may be related. I parked the car for the night and it started fine in the morning but it did it again on my way to work about 1 mile into my 3 mile drive. It started back up right away. I parked it for my 10 hour shift and would not start back up on my way home. Still turned over fine but wouldnt fire up. I tired the remote starter and it fired right up. On my way home it stalled one more time on the highway. I was able to throw it in neutral and start it back up to get it to my local mechanic. No check engine lights or computers codes pop up. So far my mechanic has been stumped. He has had it for a couple days.

    PLEASE HELP!!!

    I did some research and learned this is a common problem with many different things that could be the problem. I have heard MAP Sensor, Crank Position Sensor, PMC could all be the issue.

    Has anyone had a similar problem? What is easy enough for me to do myself that could solve the problem?

    Thanks

  2. #2
    Join Date
    Aug 2010
    Location
    Mesa Arizona
    Posts
    64

    Re: 1998 Jeep Cherokee Sport Shuts off While Idle/Driving

    I just had very similar issues. Couldn't figure it out. I finally let it run and started touching harnesses and it died on me as soon as i touched the crank postion sensor harness. I would recommend doing the same.

  3. #3
    singhgurdas's Avatar
    singhgurdas is offline Junior Member
    Join Date
    Nov 2010
    Location
    Frazier Park, CA
    Posts
    2

    Re: 1998 Jeep Cherokee Sport Shuts off While Idle/Driving

    Quote Originally Posted by jcianciolo View Post
    Last week my 1998 Jeep Cherokee Sport 4.0L inline 6 cyl started to shut off on me for no apparent reason. It first started while idled at a stop light. I started it right back up with no problem. About 30 seconds later same thing, stalled again. This time it would not start right away. Brand new battery and idle air control valve so it was turning over just fine. After a few minutes of trying it finally started again. I blew through the red light thinking I would jump start a clogged fuel filter or something. While driving at about 50-60 mph, it shut off again. This time it would start back up. After about 30 minutes I had tried everything. The last thing I tried was turning off all power drains, like the radio and heater and it started right back up. This was probably just coincidence, but I figure it may be related. I parked the car for the night and it started fine in the morning but it did it again on my way to work about 1 mile into my 3 mile drive. It started back up right away. I parked it for my 10 hour shift and would not start back up on my way home. Still turned over fine but wouldnt fire up. I tired the remote starter and it fired right up. On my way home it stalled one more time on the highway. I was able to throw it in neutral and start it back up to get it to my local mechanic. No check engine lights or computers codes pop up. So far my mechanic has been stumped. He has had it for a couple days.

    PLEASE HELP!!!

    I did some research and learned this is a common problem with many different things that could be the problem. I have heard MAP Sensor, Crank Position Sensor, PMC could all be the issue.

    Has anyone had a similar problem? What is easy enough for me to do myself that could solve the problem?

    Thanks

    check o2 sensor wire ..sometime it ground with body and shuts off engine.. check the back sensor 1st its after the cat..

  4. #4
    DeadHammer's Avatar
    DeadHammer is offline Member
    Join Date
    Oct 2008
    Location
    Denver CO
    Posts
    73

    Re: 1998 Jeep Cherokee Sport Shuts off While Idle/Driving

    I know a malfunctioning CSP sensor can cause a no start / kill condition and dose not always trip a code. Its easy enough to get to I believe, it's on the rear of the engine driver side topish / 1:00 position of the flywheel housing. After the engines cool restart it and jiggle the connector and wires and see if does something. I believe that the fuel injectors won't cycle if the engine computer can't read an input from this sensor and the engine just dies. Using a node light that plugs into the fuel injector harness (it flashes when the injector fires, harbor freight sells them cheap) could help you tell if the injectors are firing. Also when you turn the key on can you hear the whirring sound of the fuel pump in the tank, it sounds like a electric motor? Hope this helps.

  5. #5
    buells2t's Avatar
    buells2t is offline Junior Member
    Join Date
    May 2009
    Location
    Las Vegas
    Posts
    9
    Sounds like a bad/loose connection.

    I had the same problem with a Cherokee I had years ago. Replaced the crank sensor and a few other things that didn't help. My brother finally discovered it was a bad connection of the crank position sensor wire at the ECM the pin was loose in the connector. Pushed it in tight and it never did it again.

    Mike
    97 Geo Tracker 3.5 lift/31x10.5 tires/rear locker/Rock Rails/Skid Plates
    97 Grand Cherokee 5 inch lift, 33x12.5 tires/locker front rear
    98 K2500 Chevy Suburban
    http://danielsperformance.com/backroad
    http://www.mike-daniels.blogspot.com/

  6. #6
    jcianciolo's Avatar
    jcianciolo is offline Junior Member
    Join Date
    Nov 2010
    Posts
    9

    Re: 1998 Jeep Cherokee Sport Shuts off While Idle/Driving

    Quote Originally Posted by DeadHammer View Post
    I know a malfunctioning CSP sensor can cause a no start / kill condition and dose not always trip a code. Its easy enough to get to I believe, it's on the rear of the engine driver side topish / 1:00 position of the flywheel housing. After the engines cool restart it and jiggle the connector and wires and see if does something. I believe that the fuel injectors won't cycle if the engine computer can't read an input from this sensor and the engine just dies. Using a node light that plugs into the fuel injector harness (it flashes when the injector fires, harbor freight sells them cheap) could help you tell if the injectors are firing. Also when you turn the key on can you hear the whirring sound of the fuel pump in the tank, it sounds like a electric motor? Hope this helps.

    I took the car back from the mechanic yesterday because the thing ran like a top while he had it (of course). It ran great all day yesterday and now today on the way into work same thing. Died at a stop light and wouldnt start. After a tow to the office it started right back up when it came off the tow bed. I have no clue and my mechanic says its not the CPS or MAP Sensor. I checked all my wiring and connections yesterday with the car running with no stalls or anything. Not sure what else to do.

  7. #7
    jcianciolo's Avatar
    jcianciolo is offline Junior Member
    Join Date
    Nov 2010
    Posts
    9

    Re: 1998 Jeep Cherokee Sport Shuts off While Idle/Driving

    Quote Originally Posted by buells2t View Post
    Sounds like a bad/loose connection.

    I had the same problem with a Cherokee I had years ago. Replaced the crank sensor and a few other things that didn't help. My brother finally discovered it was a bad connection of the crank position sensor wire at the ECM the pin was loose in the connector. Pushed it in tight and it never did it again.

    Mike


    My mechanic says it isnt the CPS but everything I have read says the opposite. I just was reseating all my wiring while teh car was running and nothing I did made the car stall. I then unplugged the CPS as it was running and the car obviously stalled. When I plugged the CPS back in and started up the car, the check engine light came on. Not sure if unplugging the CPS caused this but now maybe my mechanic has a code he work from.

  8. #8
    jcianciolo's Avatar
    jcianciolo is offline Junior Member
    Join Date
    Nov 2010
    Posts
    9

    Re: 1998 Jeep Cherokee Sport Shuts off While Idle/Driving

    Quote Originally Posted by jcianciolo View Post
    I took the car back from the mechanic yesterday because the thing ran like a top while he had it (of course). It ran great all day yesterday and now today on the way into work same thing. Died at a stop light and wouldnt start. After a tow to the office it started right back up when it came off the tow bed. I have no clue and my mechanic says its not the CPS or MAP Sensor. I checked all my wiring and connections yesterday with the car running with no stalls or anything. Not sure what else to do.
    I fuel pump seems to be working fine.

  9. #9
    singhgurdas's Avatar
    singhgurdas is offline Junior Member
    Join Date
    Nov 2010
    Location
    Frazier Park, CA
    Posts
    2

    Re: 1998 Jeep Cherokee Sport Shuts off While Idle/Driving

    Quote Originally Posted by jcianciolo View Post
    I fuel pump seems to be working fine.

    loosen distributor bolt on the block, and turn the Distributor CClock, i know there in not much to play ( 2-3 mm) it works sometime..

  10. #10
    MoparMatt77's Avatar
    MoparMatt77 is offline Member
    Join Date
    Feb 2009
    Location
    Sacramento, CA
    Posts
    74

    Re: 1998 Jeep Cherokee Sport Shuts off While Idle/Driving

    Map, O-2, IAC, and TPS generally cause poor idle, not no-start.

    Neutral safety?? Do your back up lights work?

    What is pressure and volume output of fuel pump?

    When you have no start - Do you have no fuel nor spark?

    How's the alternator volts output with all elect acc on?

    Crank, Cam sensor, Fuel pump, or even a bad Battery wiring harness can cause no start.

    My wife was driving my 97 XJ and it died at a stop light and wouldn't start. I got there and it started right up...Good Optima! With the lights, radio, and defrost on the Volts were under 12v, just the lights on it charged at +13.5v. Alternator tested bad regulator. I upgraded the Alternator to a 136 amp (some alt bracket mods req), then replaced / Rebuilt the Starter, Battery, PDC power and ground cables with 2 gauge winch cable from Napa, and swapped over to some Marine grade cables. Haven't had no start problem since. Best of all I got to upgrade weaker electrical components + the Jeep'll be ready for adding a winch and lights too!
    "My Jeep won the war; your Honda can mow my lawn!"

  11. #11
    jcianciolo's Avatar
    jcianciolo is offline Junior Member
    Join Date
    Nov 2010
    Posts
    9

    Re: 1998 Jeep Cherokee Sport Shuts off While Idle/Driving

    Changed out the Crank Position Sensor. While I was in there decided to replace the valve cover gasket as well. Everything has been all good since. Thanks for all the help. I will keep you posted.

  12. #12
    ste63's Avatar
    ste63 is offline Junior Member
    Join Date
    Sep 2011
    Posts
    2

    Re: 1998 Jeep Cherokee Sport Shuts off While Idle/Driving

    Quote Originally Posted by jcianciolo View Post
    Last week my 1998 Jeep Cherokee Sport 4.0L inline 6 cyl started to shut off on me for no apparent reason. It first started while idled at a stop light. I started it right back up with no problem. About 30 seconds later same thing, stalled again. This time it would not start right away. Brand new battery and idle air control valve so it was turning over just fine. After a few minutes of trying it finally started again. I blew through the red light thinking I would jump start a clogged fuel filter or something. While driving at about 50-60 mph, it shut off again. This time it would start back up. After about 30 minutes I had tried everything. The last thing I tried was turning off all power drains, like the radio and heater and it started right back up. This was probably just coincidence, but I figure it may be related. I parked the car for the night and it started fine in the morning but it did it again on my way to work about 1 mile into my 3 mile drive. It started back up right away. I parked it for my 10 hour shift and would not start back up on my way home. Still turned over fine but wouldnt fire up. I tired the remote starter and it fired right up. On my way home it stalled one more time on the highway. I was able to throw it in neutral and start it back up to get it to my local mechanic. No check engine lights or computers codes pop up. So far my mechanic has been stumped. He has had it for a couple days.

    PLEASE HELP!!!

    I did some research and learned this is a common problem with many different things that could be the problem. I have heard MAP Sensor, Crank Position Sensor, PMC could all be the issue.

    Has anyone had a similar problem? What is easy enough for me to do myself that could solve the problem?

    Thanks
    replace the crank sensor that should do it

  13. #13
    ste63's Avatar
    ste63 is offline Junior Member
    Join Date
    Sep 2011
    Posts
    2

    Re: 1998 Jeep Cherokee Sport Shuts off While Idle/Driving

    Quote Originally Posted by jcianciolo View Post
    Last week my 1998 Jeep Cherokee Sport 4.0L inline 6 cyl started to shut off on me for no apparent reason. It first started while idled at a stop light. I started it right back up with no problem. About 30 seconds later same thing, stalled again. This time it would not start right away. Brand new battery and idle air control valve so it was turning over just fine. After a few minutes of trying it finally started again. I blew through the red light thinking I would jump start a clogged fuel filter or something. While driving at about 50-60 mph, it shut off again. This time it would start back up. After about 30 minutes I had tried everything. The last thing I tried was turning off all power drains, like the radio and heater and it started right back up. This was probably just coincidence, but I figure it may be related. I parked the car for the night and it started fine in the morning but it did it again on my way to work about 1 mile into my 3 mile drive. It started back up right away. I parked it for my 10 hour shift and would not start back up on my way home. Still turned over fine but wouldnt fire up. I tired the remote starter and it fired right up. On my way home it stalled one more time on the highway. I was able to throw it in neutral and start it back up to get it to my local mechanic. No check engine lights or computers codes pop up. So far my mechanic has been stumped. He has had it for a couple days.

    PLEASE HELP!!!

    I did some research and learned this is a common problem with many different things that could be the problem. I have heard MAP Sensor, Crank Position Sensor, PMC could all be the issue.

    Has anyone had a similar problem? What is easy enough for me to do myself that could solve the problem?

    Thanks
    replace the crank sensor that should do it

  14. #14
    saar's Avatar
    saar is offline Member
    Join Date
    Sep 2009
    Location
    il
    Posts
    59

    Re: 1998 Jeep Cherokee Sport Shuts off While Idle/Driving

    Just noticed that thread, I had the exact same problem with the exact same solution, CPS had been replaced and everything is fine since then.
    Saar.

  15. #15
    billyray40's Avatar
    billyray40 is offline Junior Member
    Join Date
    Dec 2011
    Posts
    3

    Re: 1998 Jeep Cherokee Sport Shuts off While Idle/Driving

    Quote Originally Posted by jcianciolo View Post
    Last week my 1998 Jeep Cherokee Sport 4.0L inline 6 cyl started to shut off on me for no apparent reason. It first started while idled at a stop light. I started it right back up with no problem. About 30 seconds later same thing, stalled again. This time it would not start right away. Brand new battery and idle air control valve so it was turning over just fine. After a few minutes of trying it finally started again. I blew through the red light thinking I would jump start a clogged fuel filter or something. While driving at about 50-60 mph, it shut off again. This time it would start back up. After about 30 minutes I had tried everything. The last thing I tried was turning off all power drains, like the radio and heater and it started right back up. This was probably just coincidence, but I figure it may be related. I parked the car for the night and it started fine in the morning but it did it again on my way to work about 1 mile into my 3 mile drive. It started back up right away. I parked it for my 10 hour shift and would not start back up on my way home. Still turned over fine but wouldnt fire up. I tired the remote starter and it fired right up. On my way home it stalled one more time on the highway. I was able to throw it in neutral and start it back up to get it to my local mechanic. No check engine lights or computers codes pop up. So far my mechanic has been stumped. He has had it for a couple days.

    PLEASE HELP!!!

    I did some research and learned this is a common problem with many different things that could be the problem. I have heard MAP Sensor, Crank Position Sensor, PMC could all be the issue.

    Has anyone had a similar problem? What is easy enough for me to do myself that could solve the problem?

    Thanks
    I had the same problem my hold down bracket on the battery was loose I tightened it up and it stopped.Only problem I'm having now is it stalls when i put it in gear before it gets to operating temperature.As soon as it gets to temp runs fine and I have no problems.Not to say this is your problem but try as many simple things as you can before buying parts(wiggle wires while its running etc)hope this helps

Similar Threads

  1. Idle issue (?) 99 Jeep Cherokee Sport
    By SteveJeep in forum All other Jeep models
    Replies: 2
    Last Post: 08-30-2010, 05:29 PM
  2. Replies: 0
    Last Post: 06-03-2010, 02:50 PM
  3. Jeep Cherokee Sport 4x4 1998 ~115,000 miles - $3400 NJ
    By jimbayne in forum Items for Sale, Trade, or Give Away
    Replies: 0
    Last Post: 01-21-2009, 07:20 PM
  4. Cherokee shuts-down while driving - help please!
    By krustyman in forum Cherokee, Commander, Wagoneer and Liberty
    Replies: 9
    Last Post: 05-03-2007, 11:26 AM
  5. Replies: 5
    Last Post: 07-20-2003, 08:00 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Log in

Log in