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No power going to fuel pump

Tiny
ALDERSONK
  • MEMBER
  • 1989 GMC S15
  • 4.3L
  • 6 CYL
  • 4WD
  • AUTOMATIC
There is no power going to fuel pump. The truck runs if you spray starter fluid in throttle body. There was a broken wire behind the engine I fixed, new fuel pump tested before installing, also new fuel pump relays and fuses. Have looked everywhere on truck I cant figure it out. Was driving it was running good and just stopped fueling.
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Friday, June 6th, 2014 AT 8:26 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,192 POSTS
Have you checked fuses? Is there power at the fuel pump relay?
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Friday, June 6th, 2014 AT 8:47 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
Are you sure you are testing it correctly? It only powers for 2 seconds when the key is first turned on. Power resumes when the computer sees a tach signal from the engine cranking.
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Saturday, June 7th, 2014 AT 2:33 AM
Tiny
ALDERSONK
  • MEMBER
  • 2 POSTS
I've checked the fuses they are fine. There is no power going to the fuel pump. I have ohm checked the wires from the relay to the pump there is normal resistance (0.7ohms). There is power to the relays.
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Saturday, June 7th, 2014 AT 8:58 PM

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