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What causes you to not get power to new fuel pump?

Tiny
CROB80
  • MEMBER
  • 1998 GMC SUBURBAN
  • 250,000 MILES
I drove it to school, turned it off and when I tried to crank it an hour later all it would do was turn over. Didnt hear the fuel pump kick on so figured it was bad, bought a new one put it un and cant get power to it. Ive checked the relay and its good. Any suggestions please
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Sunday, February 26th, 2012 AT 1:11 AM

6 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be the computer controlled of the fuel pump relay-
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Sunday, February 26th, 2012 AT 1:26 AM
Tiny
CROB80
  • MEMBER
  • 3 POSTS
Changed the computer also and no change. Simeone said check the crank sensor but I dont know how many ohms it is supposed to read.
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Sunday, February 26th, 2012 AT 1:37 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check ignition fuse E 10amp-see below
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Sunday, February 26th, 2012 AT 1:48 AM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Lets start by checking the fuel pump and the enjecter fuses. With a meter or test light.
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Sunday, February 26th, 2012 AT 1:59 AM
Tiny
CROB80
  • MEMBER
  • 3 POSTS
Im not getting power to the box under the hood that the relay plugs in to. Where does the power come from
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Sunday, February 26th, 2012 AT 5:25 PM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Does the 10amp fuse ing e fuse show voltages with a test light or multi meter to check voltage its under the hood. If it has power on both sides of the fuse. Pull the relay out their is a diagram on the side and check for power at pin 30 with the key on. Start here
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Monday, February 27th, 2012 AT 12:56 AM

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