dual fuel tank problem - Ford Truck Enthusiasts Forums
 

Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1987 - 1996 F150 & Larger F-Series Trucks
Log In 


1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

dual fuel tank problem

Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 02-06-2013, 09:56 PM
stopp429 stopp429 is offline
New User
 
Join Date: Jan 2013
Posts: 9
stopp429 is starting off with a positive reputation.
dual fuel tank problem

Hey everybody i have a 87 ford f250 custom and it has the dual tanks. i filled both tanks and run the rear tank and the needle doesnt move, i switch to the front tank which was full and i have only been running the rear tank and the front tank is at half empty. while the rear tank hasnt used any fuel. any suggestions?
Reply With Quote
  #2  
Old 02-07-2013, 08:23 AM
Conanski's Avatar
Conanski Conanski is offline
Post Fiend
 
Join Date: Jun 2006
Location: Ottawa, Ontario
Posts: 21,898
Conanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud of
Each tank has a seperate float level sender inside it and both of yours are messed up.
__________________
Paul (Conan) O'Brien

2006 E250 4.6L 4R75w 4.10, 2004 Ranger 3.0L 5-sp X-cab 4.10, 1994 Ranger 3.0L 5-sp x-cab 3.45, 2004 Subaru Legacy 2.5L 5-spd
1996 Kawasaki ZX11D, 2002 Honda VFR800,
Reply With Quote
  #3  
Old 02-07-2013, 07:51 PM
stopp429 stopp429 is offline
New User
 
Join Date: Jan 2013
Posts: 9
stopp429 is starting off with a positive reputation.
Well if i try to fill the rear tank it doesnt take any fuel. while the front will take about 5 gallons. so its not a float issue.
Reply With Quote
  #4  
Old 02-07-2013, 08:14 PM
bluemtn95ford's Avatar
bluemtn95ford bluemtn95ford is offline
Senior User
 
Join Date: Dec 2011
Posts: 473
bluemtn95ford is gaining momentum as a positive member of FTE.bluemtn95ford is gaining momentum as a positive member of FTE.
So I'm hearing that when using the front tank, the gauge says half full. And when running the back tank, the gauge wont read at all. Correct?

Or else you're saying that regardless of the tank your switched to, your truck only uses fuel from the front tank??
__________________
~Due to the recent economic down turn, rising energy costs and mandatory labor cuts, the light at the end of the tunnel has temporarily been shut off, sorry for the inconvenience.~

~93 F250 extended cab 4x4 7.3L IDI long bed 3" turbo back banks exhaust~
Reply With Quote
  #5  
Old 02-07-2013, 10:25 PM
stopp429 stopp429 is offline
New User
 
Join Date: Jan 2013
Posts: 9
stopp429 is starting off with a positive reputation.
correct it only uses fuel from the front tank. could it be a bad selector valve and the high pressure fuel pump is just sucking it out of the front because the selector valve is stuck on the front tank?
Reply With Quote
  #6  
Old 02-07-2013, 10:39 PM
AndrewW AndrewW is offline
Freshman User
 
Join Date: Mar 2011
Location: Overland Park
Posts: 44
AndrewW is starting off with a positive reputation.
Bypass Valve. Fords are really bad about it, whats happening is while you are using the front tank it is also pumping fuel into the rear tank, basically filing it as you drive
Reply With Quote
  #7  
Old 02-07-2013, 10:42 PM
stopp429 stopp429 is offline
New User
 
Join Date: Jan 2013
Posts: 9
stopp429 is starting off with a positive reputation.
that would explain why there is gas coming out of the rear tank filler neck when i park.
where is the bypass valve?
Reply With Quote
  #8  
Old 02-07-2013, 11:24 PM
AndrewW AndrewW is offline
Freshman User
 
Join Date: Mar 2011
Location: Overland Park
Posts: 44
AndrewW is starting off with a positive reputation.
It is attached to the front fuel pump
Reply With Quote
  #9  
Old 02-08-2013, 07:32 AM
stopp429 stopp429 is offline
New User
 
Join Date: Jan 2013
Posts: 9
stopp429 is starting off with a positive reputation.
ok well here is the weird part. last night i had my neighbor helping me and he is a big time nerd when it comes to wiring and diagnosing electrical problems. we were getting power to which ever tank we selected. The funny part is that you cant hear the fuel pumps. so im getting power to the rear tank when its selected and it shuts the power off to the front tank but the front tank is the one having all the fuel used up and the only valve after the fuel tanks is the selector valve or "dual tank resivor valve".
Reply With Quote
  #10  
Old 02-08-2013, 09:07 AM
rla2005's Avatar
rla2005 rla2005 is offline
Post Fiend
 
Join Date: Oct 2005
Location: Illinois
Posts: 10,025
rla2005 is a splendid one to beholdrla2005 is a splendid one to beholdrla2005 is a splendid one to beholdrla2005 is a splendid one to beholdrla2005 is a splendid one to beholdrla2005 is a splendid one to beholdrla2005 is a splendid one to beholdrla2005 is a splendid one to behold
Dual Function Reservoir:
Click the image to open in full size.

Info on both styles: 1983 Ford Bronco '84-89 Fuel Reservoirs pictures, videos, and sounds | SuperMotors.net


The cross-flow issue you are describing is VERY common on this vintage truck.
Reply With Quote
  #11  
Old 02-08-2013, 09:08 AM
rla2005's Avatar
rla2005 rla2005 is offline
Post Fiend
 
Join Date: Oct 2005
Location: Illinois
Posts: 10,025
rla2005 is a splendid one to beholdrla2005 is a splendid one to beholdrla2005 is a splendid one to beholdrla2005 is a splendid one to beholdrla2005 is a splendid one to beholdrla2005 is a splendid one to beholdrla2005 is a splendid one to beholdrla2005 is a splendid one to behold
Quote:
Originally Posted by AndrewW View Post
Bypass Valve. Fords are really bad about it, whats happening is while you are using the front tank it is also pumping fuel into the rear tank, basically filing it as you drive
There is no Bypass Valve. I assume you are referring to the Dual Function Reservoir?
Reply With Quote
  #12  
Old 02-14-2013, 10:22 PM
stopp429 stopp429 is offline
New User
 
Join Date: Jan 2013
Posts: 9
stopp429 is starting off with a positive reputation.
ok thanks its just weird how no mater what position the switch on the dash is in (front or rear tank) it only uses fuel from the front tank.
Reply With Quote
  #13  
Old 02-15-2013, 06:42 PM
rla2005's Avatar
rla2005 rla2005 is offline
Post Fiend
 
Join Date: Oct 2005
Location: Illinois
Posts: 10,025
rla2005 is a splendid one to beholdrla2005 is a splendid one to beholdrla2005 is a splendid one to beholdrla2005 is a splendid one to beholdrla2005 is a splendid one to beholdrla2005 is a splendid one to beholdrla2005 is a splendid one to beholdrla2005 is a splendid one to behold
Quote:
Originally Posted by stopp429 View Post
ok thanks its just weird how no mater what position the switch on the dash is in (front or rear tank) it only uses fuel from the front tank.
The link I posted above describes how the reservoir works. More than likely the switching valve is stuck in one position.
Reply With Quote
 
 
 
Reply


Similar Threads
Thread Thread Starter Forum Replies Last Post
Dual Fuel Tank issue...HELP! BigRedDooly96 1987 - 1996 F150 & Larger F-Series Trucks 2 05-19-2014 08:57 AM
Couple dual tank issues Iantiler Fuel Injection, Carburetion & Fuel System 17 02-08-2014 01:30 AM
1996 Dual Tank Problem Big350 1987 - 1996 F150 & Larger F-Series Trucks 1 11-11-2013 11:31 AM
94 F150 Dual Tanks- Can I block the back tank off. Lil Josh 1987 - 1996 F150 & Larger F-Series Trucks 16 11-08-2008 06:24 PM
dual tank fuel transfer scott94f150 1987 - 1996 F150 & Larger F-Series Trucks 9 03-31-2001 07:33 PM


Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1987 - 1996 F150 & Larger F-Series Trucks

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump



All times are GMT -5. The time now is 01:16 AM.

 

Powered by vBulletin® Version 3.8.7 AC2
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
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