SPONSORED LINKS

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.
SPONSORED LINKS
Friday, June 6th, 2014 AT 8:26 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
Have you checked fuses? Is there power at the fuel pump relay?
Was this
answer
helpful?
Yes
No
Friday, June 6th, 2014 AT 8:47 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 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.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
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.
Was this
answer
helpful?
Yes
No
Saturday, June 7th, 2014 AT 8:58 PM

Please login or register to post a reply.

Related Fuel System Fuel Pump Relay Content

Replace Your Fuel Pump Relay - Easy Steps
VIDEO
Replace Your Fuel Pump Relay - Easy Steps
Instructional repair video
VIEW MORE

Sponsored links