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1994 GMC Jimmy 94 Jimmy fuel pump / no start

Tiny
CHRISTOPH80254
  • MEMBER
  • 1994 GMC JIMMY
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 126,000 MILES
I have a GMC jimmy 1994 with 126000 miles. It left me stranded the other day. I replaced the fuel pump and filter and sending unit today. It still will not start. If I put gas in the intake it runs fine till it burns it off. I checked the bleed off valve right behing the manifold and its getting gas all the way to the intakes. Im at a loss on what to do to get my truck running any advice would be greatful! Thanks for your time.
chris in louisiana
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Saturday, March 29th, 2008 AT 9:25 PM

4 Replies

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
I think Raz is refering to the oil pressure/fuel relay cutoff switch on the top rear of the engine, also does the pump run for 2-3 seconds after the key is turned to on? Have you checked for power at the pump?
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Sunday, March 30th, 2008 AT 5:55 AM
Tiny
CHRISTOPH80254
  • MEMBER
  • 4 POSTS
Yes when I turn the key the pump kicks on for 2 seconds. I can hear it. So I should check the oil pressure fuel relay cutoff? Is that the same thing as the fuel pump relay?
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Sunday, March 30th, 2008 AT 8:06 AM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
No. The oil pressure switch is on the top rear of the engine, If this is the CFI unit check for brittle wires at the injector.
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Sunday, March 30th, 2008 AT 8:14 AM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Check the CFI unit's wires.
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Monday, March 31st, 2008 AT 12:54 PM

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