Fuel Transfer from Rear tank to front tank? - Ford Truck Enthusiasts Forums
 

Go Back   Ford Truck Enthusiasts Forums > Performance, Engines & Troubleshooting > Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460)
Log In 


Fuel Transfer from Rear tank to front tank?

Reply
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 06-14-2014, 01:02 AM
Red 5 Red 5 is offline
New User
 
Join Date: Jun 2014
Posts: 3
Red 5 is starting off with a positive reputation.
Fuel Transfer from Rear tank to front tank?

I have a 1997 Ford F-350 with the 7.5 liter...

When I run it on the rear fuel cell it will transfer the fuel to the front fuel cell while I am driving... If the front fuel cell is full when I run it on the rear cell it will actually over fill the front tank and the fuel will run onto the ground while the truck is running.

Help, anyone?

Red 5
Reply With Quote
  #2  
Old 06-14-2014, 03:09 AM
rockdawg84's Avatar
rockdawg84 rockdawg84 is offline
Senior User
 
Join Date: Mar 2007
Location: Tucson, AZ
Posts: 203
rockdawg84 is starting off with a positive reputation.
you have a bad fuel pump which has a built in check valve that has gone bad. I had the same problem on my 96 F350 CCLB 4x4. Change both pumps and be good. BTW the tank that is filling is the tank with the bad check valve.
__________________
The 1996 F350 CCLB 4x4 Bruster build
Lot's of 4runners in the family 84, 98, 03
Reply With Quote
  #3  
Old 06-14-2014, 05:22 PM
Red 5 Red 5 is offline
New User
 
Join Date: Jun 2014
Posts: 3
Red 5 is starting off with a positive reputation.
Fuel Transfer

Thanks Rockdawg,

I will do that...
Reply With Quote
  #4  
Old 06-16-2014, 06:47 PM
paulm paulm is offline
Senior User
 
Join Date: Sep 2002
Location: Cottondale, Texas
Posts: 131
paulm is starting off with a positive reputation.
Quote:
Originally Posted by Red 5 View Post
I have a 1997 Ford F-350 with the 7.5 liter...

When I run it on the rear fuel cell it will transfer the fuel to the front fuel cell while I am driving... If the front fuel cell is full when I run it on the rear cell it will actually over fill the front tank and the fuel will run onto the ground while the truck is running.

Help, anyone?

Red 5
I had the same issue on my '89 F250 and the problem was the fuel tank selector valve was not right. Depending on which tank is selected that particular fuel pump applies pressure to the valve. Mine trouble started with when I changed tanks one day and the truck died. I thought the fuel pump must have been bad so I switched back to the rear tank. Then the rear tank started pumping fuel into the front tank to the point that when I removed the front tank fuel cap gas would spray out at me. Shortly thereafter, I tried switching back and on the tank switch and it got to where the truck would not run at all. A check of the fuel lines after the fuel tank selector valve showed no gas going through the valve. Popped the lines loose on the tank side of the valve and both pumps were pumping great. Spent the $140 on a new valve and all is good.
__________________
Paul
2013 F150 SuperCrew Ecoboost Max Tow 4x4
1989 F250 Reg Cab 460 5spd
Reply With Quote
  #5  
Old 06-17-2014, 12:28 AM
rockdawg84's Avatar
rockdawg84 rockdawg84 is offline
Senior User
 
Join Date: Mar 2007
Location: Tucson, AZ
Posts: 203
rockdawg84 is starting off with a positive reputation.
in 97 the truck does not have a selector valve, instead each tank has a fuel module unit (FMU) that contains the pump, sending unit and backflow valves and they are simply energized individually to pump fuel and open the return valve. the FMU is for the most part not serviceable though I am sure that there are those who could.
__________________
The 1996 F350 CCLB 4x4 Bruster build
Lot's of 4runners in the family 84, 98, 03
Reply With Quote
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
doing hutch / harpoon and have question. carl2591 1999 - 2003 7.3L Power Stroke Diesel 23 07-23-2016 01:39 PM
fuel level sending units (propane tanks) joey2fords Electrical Systems/Wiring 3 12-03-2015 06:29 PM
In cab fuel cell Boomco 1973 - 1979 F-100 & Larger F-Series Trucks 7 03-29-2015 01:33 PM
E350 van parting out roadsportusa 1968-2013 Full Size Vans 0 02-15-2015 09:35 AM
Preferred fuel cell location?????? 2zwudz 1961 - 1966 F-100 & Larger F-Series Trucks 11 03-04-2014 04:38 PM


Go Back   Ford Truck Enthusiasts Forums > Performance, Engines & Troubleshooting > Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460)

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump



All times are GMT -5. The time now is 11:01 PM.

 

Advertising - Terms of Use - Privacy Statement - Terms of Service - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup