Does your truck die when it rains? - F150online Forums

Go Back  F150online Forums > F-Series Trucks > 2004 - 2008 F-150
Does your truck die when it rains? >

Does your truck die when it rains?

2004 - 2008 F-150

Does your truck die when it rains?

 
  #1  
Old 02-27-2019, 07:31 PM
Junior Member
Thread Starter
Join Date: Feb 2019
Location: Western NC
Posts: 3
Does your truck die when it rains, or maybe after a visit to the car wash?

My truck had a habit of deciding not to run during extended rainy periods, and sometimes after a trip to the car wash. Analysis of data available via Torque OBD made it clear the fuel pump wasn't running.

My suspicion was that corrosion at the fuel tank connections was the culprit. After a few tows home (thank goodness for AAA!), I found time to investigate more fully.

While dropping the fuel tank (ugh!) I was stuck trying to disconnect the wiring from the tank. Couldn't figure out how to release the latch on the connector.

While searching YouTube for answers, I came across a video of a guy fixing his friend's F150 by replacing the fuel pump driver module. Before seeing this video, I had no idea such a thing existed! It lives on the frame crossmember at the front edge of the spare tire, just behind the evaporative emission control canister.

After cutting down the spare tire - the winch was rusted solod - I found the very sorry looking fuel pump driver module. It was already cracked, which I am sure admitted sufficient moisture to cause malfunctions. The housing was so corroded that a light tap with a screwdriver opened up a hole in the back.

I just finished the job today, so I can't say for a fact that the problem is gone, but I have a high level of confidence that it is.

The replacement Dorman part came with standoffs so that corrosion doesn't develop between the module and the frame crossmember to which it is mounted.


Replacement module in place.
 

Last edited by Paul Yeager; 02-27-2019 at 07:45 PM. Reason: Adding photos and captions.
  #2  
Old 02-27-2019, 08:28 PM
Senior Member
Join Date: Sep 2007
Location: The Barbary Coast
Posts: 3,487
Looks easy. Is it really just unclipping the wire harness, and 2 bolts?
 
  #3  
Old 02-27-2019, 08:29 PM
glc's Avatar
glc
glc is offline
Senior Member
Join Date: Dec 2006
Location: Joplin MO
Posts: 38,140
Very common issue. Be advised, the Dorman replacements have a high failure rate. The Motorcraft replacements also come with standoffs now.
 
  #4  
Old 02-28-2019, 08:30 AM
Junior Member
Thread Starter
Join Date: Feb 2019
Location: Western NC
Posts: 3
Originally Posted by Fifty150 View Post
Looks easy. Is it really just unclipping the wire harness, and 2 bolts?
Yes, once the spare tire is removed. You might the able to do it with the spare in place, but it will be more difficult.

My spare tire winch was rusted solid, so it took some work with an angle grinder to get the spare free.
 
  #5  
Old 03-01-2019, 12:23 AM
Senior Member
Join Date: Sep 2007
Location: The Barbary Coast
Posts: 3,487
In that position, you would think that the spare tire would have protected it from any water splashing up.

Nice to see that the harness was not corroded. Sure, you could splice a new harness on. Just a real pain to do things in that position. I envy guys who have a lift. I have to do everything crawling under the truck, laying on my back. Even changing the differential fluid is a pain in the a**.
 
  #6  
Old 03-01-2019, 09:49 AM
Junior Member
Thread Starter
Join Date: Feb 2019
Location: Western NC
Posts: 3
Originally Posted by Fifty150 View Post
In that position, you would think that the spare tire would have protected it from any water splashing up..
Not really. even with the spare in place, it is exposed to spray from the left rear wheel. I disabled the truck once by being aggressive with the spray wand at a car wash in that particular area.
 
  #7  
Old 03-02-2019, 02:12 AM
Senior Member
Join Date: Sep 2007
Location: The Barbary Coast
Posts: 3,487
I will have to keep that in mind. Some of the drive through car wash machines have water spraying up as you drive in. Suppose to clean the underbody. I'll be especially mindful when doing a quick spray in the driveway wash. My car wash at home technique uses one of those spray nozzles with a reservoir for soap. I buy the inexpensive Turtle Wax or Armor All brands that allegedly have wax mixed in. So I spray water to wet. Spray soap mix. Allow soap to sit and penetrate dirt. Then rinse. Not the best car wash. But better than nothing. And it gets quite a bit off the truck. Just too lazy to climb a ladder to hand wash, clay bar, & wax. Cutting back on the $14 drive through machine washes. Refuse to spend $100 for hand wash, clay bar, and wax.
 
 


Thread Tools
Search this Thread
Quick Reply: Does your truck die when it rains?


Sponsors

Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: