4.7 L V8 ENGINE: COMPLETE SHUT DOWN WHILE DRIVING

  • Tiny
  • gmk1
  • 1999 Jeep Grand Cherokee
  • 160,000 miles

Complete engine shut down when driving car at slow or highway speeds. Loose all power. All gauges go dead. Let it sit for ~ 10 min. And starts up again: Have replaced the following: C1 Wiring Harness to computer (all terminals), have replaced fuel filter, crank shaft pos. Sensor, ignition switch, ignition lock cyl. No 'check engine light' ever comes on. Grounding ok.

Question: do u think I need to replace main computer? Thanks Gil"

Monday, April 30th, 2012 AT 12:49 AM

2 Answers

  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,287 posts

No to the main computer at this point. Have you checked to make sure there are no fuseable links that are going bad? Also, are the battery terminals tight and clean?

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Monday, April 30th, 2012 AT 3:19 AM
  • Tiny
  • fixitmr
  • Member

Some have had luck with new PCM and 1 guy had trans flushed and it stopped stalling.

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Monday, April 30th, 2012 AT 3:41 AM

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