Notices
2004 - 2008 F150 2004, 2005, 2006, 2007 and 2008 Ford F150's with 5.4 V8, 4.6 V8 engine
Sponsored by:
Sponsored by:

Fuel pump problems

Thread Tools
 
Search this Thread
 
Old Jun 30, 2022 | 03:07 PM
  #1  
Estew2006's Avatar
Estew2006
Thread Starter
|
4th Gear
Joined: Jun 2022
Posts: 4
Likes: 1
Fuel pump problems

So I have a 2005 4.6 fuel pump wasn't pumping I just replaced the pump and still nothing

So I pulled it back out and checked voltage to the pump I have 12v to the pump when I cycle the key the pumps turns on for just a second and stops as if it already primed then nothing from there.

I still have 12v after the prime sequence. Where should I check next?
 
Reply
Old Jun 30, 2022 | 03:09 PM
  #2  
projectSHO89's Avatar
projectSHO89
Hotshot
20 Year Member
Photogenic
Photoriffic
Shutterbug
Joined: Jan 2004
Posts: 19,767
Likes: 1,082
From: St Louis
Check the ground circuit for the pump.

If you have battery voltage to the pump .AND. the pump is good .AND. the pump has a proper electrical connection to ground, the pump should run.

Did you check the integrity of the FPDM module?
 
Reply
Old Jun 30, 2022 | 03:15 PM
  #3  
Estew2006's Avatar
Estew2006
Thread Starter
|
4th Gear
Joined: Jun 2022
Posts: 4
Likes: 1
No I haven't checked the drive module yet. If the module is bad would I still have power to the pump checking the 2 wires to the pump connection?

I assume I wouldn't have any power to the pump if it was bad but idk
 
Reply
Old Jun 30, 2022 | 03:22 PM
  #4  
tbear853's Avatar
tbear853
Hotshot
20 Year Member
Shutterbug
Loved
Community Favorite
Joined: Feb 2004
Posts: 10,837
Likes: 2,612
From: The Shenandoah Valley
Look at the FPDM up above the spare on driver side towards front. You can roll under there and see it from below if you unwind the spare, right behind the left rear tire, round crossmember. You can also look through that right rear fender well with a mirror on a stick.

 
Reply
Old Jun 30, 2022 | 03:32 PM
  #5  
Estew2006's Avatar
Estew2006
Thread Starter
|
4th Gear
Joined: Jun 2022
Posts: 4
Likes: 1
So if the drive module is shot it can cause the pump to not pump even though it has 12v to it?
 
Reply
Old Jun 30, 2022 | 07:15 PM
  #6  
projectSHO89's Avatar
projectSHO89
Hotshot
20 Year Member
Photogenic
Photoriffic
Shutterbug
Joined: Jan 2004
Posts: 19,767
Likes: 1,082
From: St Louis
Originally Posted by Estew2006
So if the drive module is shot it can cause the pump to not pump even though it has 12v to it?
Certainly, since it supplies both power and ground to the electric pump.
 
Reply
Old Jun 30, 2022 | 10:22 PM
  #7  
Estew2006's Avatar
Estew2006
Thread Starter
|
4th Gear
Joined: Jun 2022
Posts: 4
Likes: 1
Well I got it fired up I had to bypass the drive module by jumping the connections on the drive module connector.

Then whoever had worked on it before had replaced the drive module and pump at one point and both electrical connectors for the drive module and pump where broke so I had to zip tie the pump connector so it would make connection.

I'll have to see if I can get new pigtails for those 2 connectors or tell the owner of the truck to check a junkyard to find good connectors
 
Reply
Old Jul 1, 2022 | 10:25 AM
  #8  
projectSHO89's Avatar
projectSHO89
Hotshot
20 Year Member
Photogenic
Photoriffic
Shutterbug
Joined: Jan 2004
Posts: 19,767
Likes: 1,082
From: St Louis
FTE Stories

Ford Trucks for Ford Truck Enthusiasts

story-0

Top 10 Fords at 2026 Carlisle Ford Nationals

 Joe Kucinski
story-1

3 Best / 3 Worst Parts of Modern Ford Ownership

 Brett Foote
story-2

10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

 Pouria Savadkouei
story-3

Every 2026 Ford Engine Explained

 Brett Foote
story-4

10 Ugly Ford Trucks That We Still Kinda Love

 Joe Kucinski
story-5

10 Things Every Truck Owner NEEDS (2026 Edition)

 Michael S. Palmer
story-6

Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

 Verdad Gallardo
story-7

Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

 Joe Kucinski
story-8

2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

 Brett Foote
story-9

Top 10 Ford Truck Tragedies

 Joe Kucinski
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Dean06919
1987 - 1996 F150 & Larger F-Series Trucks
1
Jul 23, 2015 07:01 AM
Prez
1997 - 2003 F150
6
Apr 21, 2015 09:49 PM
DougMcCarty
1997 - 2003 F150
3
Mar 25, 2013 05:04 AM




All times are GMT -5. The time now is 02:46 PM.

story-0
Top 10 Fords at 2026 Carlisle Ford Nationals

Slideshow: Top 10 Fords at 2026 Ford Nationals

By Joe Kucinski | 2026-06-09 11:10:08


VIEW MORE
story-1
3 Best / 3 Worst Parts of Modern Ford Ownership

Based on years of owning multiple modern Ford products.

By Brett Foote | 2026-06-09 10:53:36


VIEW MORE
story-2
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

SPONSORED: From muddy boots to rain-soaked cargo, these upgrades address some of the most common frustrations Ford truck owners face every day.

By Pouria Savadkouei | 2026-06-08 18:50:34


VIEW MORE
story-3
Every 2026 Ford Engine Explained

Here's everything you need to know about every Ford engine available for the 2026 model year.

By Brett Foote | 2026-06-05 12:58:01


VIEW MORE
story-4
10 Ugly Ford Trucks That We Still Kinda Love

Slideshow: 10 ugly Ford trucks that we still kinda love.

By Joe Kucinski | 2026-06-03 09:51:16


VIEW MORE
story-5
10 Things Every Truck Owner NEEDS (2026 Edition)

Slideshow: the best gifts for dads & grads

By Michael S. Palmer | 2026-06-03 15:43:58


VIEW MORE
story-6
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.

By Verdad Gallardo | 2026-06-03 11:38:36


VIEW MORE
story-7
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Slideshow: 10 most expensive Ford trucks ever sold on Bring a Trailer.

By Joe Kucinski | 2026-05-27 16:24:34


VIEW MORE
story-8
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Here's everything that has changed for the latest model year.

By Brett Foote | 2026-05-27 16:17:28


VIEW MORE
story-9
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE