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Diesel engine sometimes quits running during long drive, starts up again in 5 - 10 minutes.

Tiny
JPARAGUAS
  • MEMBER
  • 1997 GMC SUBURBAN
  • V8
  • TURBO
  • 4WD
  • AUTOMATIC
  • 274,000 MILES
Have had vehicle only 8 months. Runs great otherwise. Long drives of more than 3 - 4 hours continuous is when engine suddenly quits running. But starts up after 5 - 10 minutes of waiting. Previous owner mentioned having to install an extension device for some kind of electrical control to place it off the top of the engine and away from it to keep the "control unit" cool. Not sure what this "control unit" is called. It is approximately 3 x 3 inch square.
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Sunday, January 12th, 2014 AT 12:27 AM

2 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,328 POSTS
When it stalls, have you checked to see if there is spark and fuel to the engine?
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Tuesday, January 14th, 2014 AT 8:31 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,328 POSTS
Sorry, you have the word Diesel everywhere and I still didn't see it. Do you lose fuel pressure when this happens?
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Tuesday, January 14th, 2014 AT 8:32 AM

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