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Author Topic: 4.0L quitting ?  (Read 847 times)

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Offline madcarson

  • Winch Wench
  • Posts: 31
4.0L quitting ?
« on: November 18, 2009, 05:40:11 PM »
The wifes jeep has been acting up lately,3 times this week it will just quit out of the blue when you go to stop ? It starts right up again so not sure what's up,I know batt.is weak but if  it's running then alt.should keep eng.alive ? :-\
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Offline JENSSEN

  • Talks waaay too much!
  • Posts: 1606
    • Racing For The Cure
Re: 4.0L quitting ?
« Reply #1 on: November 18, 2009, 06:06:42 PM »
may sound crazy but check your EGR aswell,..
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Offline cLAY

  • Talks waaay too much!
  • Posts: 2377
Re: 4.0L quitting ?
« Reply #2 on: November 18, 2009, 08:01:07 PM »
CPS(crankshaft position sensor), tells the computer when to fire the coil. When it goes, no spark.

If the battery still starts the jeep after it died then its unlikely that the engine stalled due to low electrical power. However a battery with an internal short can cause some REALLY weird electrical issues.
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'93 ZJ, 5.2L, lifted/locked/36s..<gone>
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Offline cdnhonda

  • Baby Wheeler
  • Posts: 81
Re: 4.0L quitting ?
« Reply #3 on: November 20, 2009, 06:27:57 PM »
or tey the tps as well
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life without mud is no life at all

Offline Zombie

  • UberWheeler
  • Posts: 398
  • Jeff the Zombie Jeep
Re: 4.0L quitting ?
« Reply #4 on: November 21, 2009, 02:26:36 AM »
just after I bought mine xj, it would stall out after a few minutes of idle, it was kinda pulsating and had a very rough idle.
it would almost die, then bump the idle up a bit and repeat this a few times and then finally die on me.
I think I had a bad connection on one of the injectors because I wiggled them around a bit, and it has been fine since.
although the previous owner had just replaced one of the injector O-rings, so that could be it too.
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97 Red XJ, 4.5", 31" mud's, ARB front, 9500lb winch, bushwhacker's, warn sliders, HnT SYE and CV drive shaft - written off and sold for parts :(

Offline madcarson

  • Winch Wench
  • Posts: 31
Re: 4.0L quitting ?
« Reply #5 on: November 21, 2009, 07:00:59 AM »
looks like it was just batt.
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