Changed the fuel pump twice and it still will not run

Tiny
TFRANKLIN
  • MEMBER
  • 2000 DODGE TRUCK
  • V8
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
I have changed the fuel pump twice and it still will not run. What else could be the problem
Saturday, March 8th, 2008 AT 3:36 PM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

When you turn the key on, does the fuel pump come on?
If the pump does not come on, then it could be a bad relay or faulty wiring.
First check the relay, it is located in the under-hood fuse box (see diagram below).

Here is a guide of how to test the relay:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

If the relay is good, then check to see if there is power to the fuel pump harness. Having no power to the connector means there is a short in that circuit.

https://www.2carpros.com/articles/how-to-check-wiring

If the fuel pump comes on but you are not getting any fuel to the injectors it could be due to a restriction in the fuel line, clogged fuel filter or a bad fuel pressure regulator.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

I have attached diagrams for your reference.

Please let me know if you have any questions.
Thank you.
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Thursday, October 28th, 2021 AT 2:19 PM

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