Testing Fuel Pump

Tiny
TEOJLO14
  • MEMBER
  • 2003 LINCOLN TOWN CAR
  • 4.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 168,000 MILES
I had major power issues where I had no crank, round corroded power wires that feed the ignition switch, repaired, now I have crank. However, the vehicle will not start. It seems to me that I am getting no fuel, plus I do not hear my fuel pump priming. Having the initial electrical issue, I want to determine if the Pump works at all, but not quite sure what voltages I should be seeing at the FPDM. My questions are:
Can I apply direct twelve volts to the pump and hear it priming or running to verify that the pump works at all?
If it does prime or run with direct twelve volts would the PCM or FPDM be at fault. I know I have twelve volts from the inertia switch to the FPDM and I have ground, not quite sure what to see coming from the PCM.
Thursday, October 20th, 2016 AT 2:02 PM

2 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
You probably have a security issue with this. so try resetting it. see link if link does not work look online for your car on how to do it.

https://www.2carpros.com/articles/how-to-reset-a-security-system
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Thursday, October 20th, 2016 AT 3:41 PM
Tiny
RENEE L
  • ADMIN
  • 1,260 POSTS
Hi TEOJLO14@GMAIL.COM,

Here is a helpful link to an article from this site explaining the process of checking the fuel pump and pressure yourself. If you decide you would like do this yourself you can purchase a fuel pressure gauge online from sites like Amazon.com.

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

Thank you for visiting 2CarPros.com.

Kindest regards,

Renee
Admin
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Friday, October 21st, 2016 AT 11:31 AM

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