Fuel return question - Ford Powerstroke Diesel Forum
User Tag List

LinkBack Thread Tools Display Modes
post #1 of 5 Old 04-18-2013, 02:43 PM Thread Starter
Powerstroke.org Rookie
Join Date: Mar 2013
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Fuel return question

I have a 1996 F350 dually with the powerstroke engine and has the factory dual fuel tanks. Does the fuel return divert the unused fuel back into the selected tank or does it split it back into both tanks? I cannot use the front tank because it wont fill up and I haven't done a vent mod yet. The front tank was next to empty so I have been using the rear tank only. After putting about 7 tanks of diesel through the rear tank, I was curious to how much I had in the front tank and switched over while driving. I now have a little more than a quarter tank in the front. I have not added any diesel to the front, only the rear, yet I have mysteriously added fuel to the front. That made me suspect the fuel return divided the excess fuel into both tanks. Can anyone confirm this? Thanks!
j.pearson is offline  
Sponsored Links
post #2 of 5 Old 04-18-2013, 02:52 PM

351fifty's Avatar
Join Date: May 2011
Location: Canton and kennesaw
Posts: 23,174
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 34
Thanked 205 Times in 193 Posts
Feedback Score: 4 reviews
Usually it diverts to both, rite back to the selector valve, but that makes me wonder since I primarily only use my front to keep my wallet happy at the pumps lol, but gotta love a regulated return

2011 f150 ecoboost 4x4 323/452 on php dyno 11/16/13
1995 CCLB DRW 324K
2001 CCLB DRW 319K
Dp tuner infinity, exhaust, intake, chipped, tricked, and wrecked

Originally Posted by marine5811
The stock downpipe in an OBS is flat because I'm a ginger.
Originally Posted by alberta 7.3
Finding a decent woman is like shopping for a used truck. You spend most of your time picking through the money pits, wrecks, and basket cases until you find one that you can tolerate
Originally Posted by JJFLASH
Well at least you caught the loose bolts before they cause any damage. Nothing worse than a sloppy hole
351fifty is offline  
post #3 of 5 Old 04-18-2013, 03:02 PM
Join Date: Jul 2011
Location: Birmingham, Al
Posts: 57
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
It "should" return to the tank that it is pulling from...but I could see the possibility of an internal leak In the selector valve that could let some find its way back into the other tank. Weirder stuff happens on a regular basis!

1997 CCLB 4x4 ZF, 295-75-16 BFG A/T's, 16x8 ARE Outlaw II's, DP & 4" exhaust, 4" Skyjacker Suspension kit, FPR shim, DIY intake, Autometer boost and pyro, PHP Hydra Chip, DIY 140V IDM and E-Fuel are next!
Reed P is offline  
post #4 of 5 Old 04-18-2013, 04:35 PM
BANNED by Kris
BigFuel's Avatar
Join Date: Oct 2011
Location: Pasadena, CA
Posts: 6,140
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Thanks: 48
Thanked 111 Times in 103 Posts
Feedback Score: 0 reviews


+ Matt - Star Tiger +
-Bean's: 160/100 (FF Injectors), 2/ 6-POS chips (TW & Beans tunes), Overboost controller, E-Fuel
-BANKs: downpipe, full exhaust, gauges, test pipes, intercooler
-Irate: T-4 kit, IC pipes, 3" Replacement Plenums, BASB Turbo
-Mag-Hytec trans. and pumpkin covers
-6637, CCV, IDM, 6.0 Fan, 49-Federal PCM swap, MAP line Mod
-370 Amp alt., 40k trans cooler, SRP1.1
-twin on-board air w/ 10 gal. tank

Re-pinning '97 Cali PCM to Federal
BigFuel is offline  
post #5 of 5 Old 04-19-2013, 07:26 AM
Compression Ignition Addict
OL' OutLaw's Avatar
Join Date: Jan 2011
Location: Suthren OryGun
Posts: 460
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
yep, it does switch both feed and return.....like he said above tho, if the Walf is leaking inside, (read dirty messed up Walf), then you could get some fuel back into the un-selected tank

Oh, and that's my Swedish impression for the day....

'97 Centurion. F350 4x4 CCLB
Full Force 180cc Stage I's, D66, SRP-1.1, ARP, Banks IC, DIY E-Fuel, EBPV Del & Gut'd Ped., BD Exhaust Brake., SD IDM, HPX, BstFoolr, 4" DP - 4" exh,
6.0 Fan, 180 T-Stat, DIY Don.105006 AF, CCV Mod, BTS, W/ SD Trans Lines, Tru-Cool Max, PML Trans Pan, Bumper Mod, IssPro Gauges, Fluidampr, Mellings LPOP.....
Tuned by "The WildMan".
OL' OutLaw is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may 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

For the best viewing experience please update your browser to Google Chrome