1994 GMC dies without warning

Tiny
BILL111
  • MEMBER
  • 1994 GMC SIERRA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 98,000 MILES
1994 GMC 1500 2WD dies without warning. Pull off to the side of the road and wait five minutes. Starts back up and I am on my merry way. It seems to be hot but not steaming hot. The other day it did it pulling out of the parking lot so that obviously wasn't a heat issue. Sometimes it will start right back up and other times it takes four or five tries. Battery terminals are good, lights and radio still work, starter engages, WTH? Looking through the files several other people have the same issue.
Tuesday, July 5th, 2011 AT 1:55 AM

2 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
How long since a tune-up? Any applicable mil codes? When the problem occurs, if it cranks good but won't start, have a helper crank it, while you check for spark at the plugs. If you have spark everywhere, use a gage and check fuel pressure. With intermittent issues, you have to test when the problem is ongoing.
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Tuesday, July 5th, 2011 AT 2:57 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check your fuel pressure and this being a TBi unit check for a blown gasket under the tbi unit
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Saturday, July 9th, 2011 AT 11:04 PM

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