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Fuel Pump relay?

Tiny
DJCL
  • MECHANIC
  • 767 POSTS
Check and see if the pump has voltage to it when you first turn the key to crank.
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Friday, June 26th, 2020 AT 12:50 PM (Merged)
Tiny
DENNYP
  • MECHANIC
  • 1,824 POSTS
Check for a broken terminal inside the fuel pump module connector. Ohm test the terminals from the module to the pump connector.
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Friday, June 26th, 2020 AT 12:50 PM (Merged)
Tiny
DJCL
  • MECHANIC
  • 767 POSTS
Also check and see if there is 12 volts on the white wire @ the fuel pump relay when cranking the engine
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Friday, June 26th, 2020 AT 12:50 PM (Merged)
Tiny
WOLFRANCH
  • MEMBER
  • 5 POSTS
When I got the new fuel pump it came with a new pig tail. The old connection has been replaced. Is there a way to hot wire the pump from the relay to test it.
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Friday, June 26th, 2020 AT 12:50 PM (Merged)
Tiny
CHRISTINANEAL23
  • MEMBER
  • 2 POSTS
We got it fixed. It was a rigged up inertia switch from the pervious user. Thanks!
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Friday, June 26th, 2020 AT 12:50 PM (Merged)
Tiny
DJCL
  • MECHANIC
  • 767 POSTS
Good luck
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Friday, June 26th, 2020 AT 12:50 PM (Merged)
Tiny
SUPERTRUCKER89
  • MEMBER
  • 2 POSTS
  • 1998 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 138,000 MILES
I have a 98 Z-71. It was idling and suddenly stopped. Now, when you turn the key on, the fuel pump does not make any noise. The vehicle spins over but does not fire. The relay is not clicking like it did before. I put it in another vehicle and worked fine. Is there a fuse somewhere other than the fuse box for the fuel pump? Or is there a reason why the fuel pump relay would quit working but would still be ok in another vehicle?

-fuel pump bad
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Friday, June 26th, 2020 AT 12:50 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,700 POSTS
HI:
It doesn't sound like the relay is the problem. I think your fuel pump went out. Check fuel pump pressure. If you need the tools, most nationally recognized parts stores will rent them to you.

Let me know what pressure you get.

Joe
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Friday, June 26th, 2020 AT 12:50 PM (Merged)
Tiny
AFRAN
  • MEMBER
  • 1 POST
  • CHEVROLET SILVERADO
Have a 1998 Chevy 2-wheel drive, 8 cylinder with 150,000m. Truck will crank and run a couple of seconds and shut off. Was told fuel pump had been replaced. If it does run, so far it will run fine until shut off. Have replaced fuel relay and ran fine for a week. Hear fuel pump when key turned on and off.
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Tuesday, July 7th, 2020 AT 1:44 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Sir
You can hear the pump all day-but if its not producing the correct pressure nothing is gonna happen-You need to check the fuel pressure with a fuel pressure gauge to nail the regulator/pump. Even if you have the correct pressure if the injector/s are not energizing, again we won't have fuel.
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Tuesday, July 7th, 2020 AT 1:44 PM (Merged)
Tiny
BKWHT
  • MEMBER
  • 1 POST
  • 1998 CHEVROLET SILVERADO
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 125,000 MILES
My truck was running perfectly until yesterday when the engine stopped suddenly. Power stearing went out and everything. I coasted to the curb and parked. It turns over but will not start. I can hear the fuel pump in the gas tank humming when I try to start it. I pulled the air filter and it is bone dry, even after trying to start it several times. My local Auto Zone does not have the fuel pump relay I need. Am I stuck till it gets in stock?
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Tuesday, July 7th, 2020 AT 1:50 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
The fuel pump is coming on tells me the relay is good but is it producing the correct fuel pressure and is it getting injection pulses and does it have spark.
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Tuesday, July 7th, 2020 AT 1:50 PM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
If you have the spider fuel system, I don't think you can see anything by removing the air filter. The info I looked at was a K1500 4.3 liter engine.

If you think it is fuel, you might check fuel pressure first. Some of the national brand autostores will loan fuel pressure gages. You might have to put up a deposit, but, you get it back, when you return the tool.
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Tuesday, July 7th, 2020 AT 1:50 PM (Merged)
Tiny
DIESELMAN96
  • MEMBER
  • 3 POSTS
A quick check to see if its fuel or spark is to take some carb cleaner and spray in the air intake while someone cranks the engine if it runs while you spray its a fuel problem if it doesnt run you have a spark problem.
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Tuesday, July 7th, 2020 AT 1:50 PM (Merged)

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