Dual tanks question

Reply Subscribe

Thread Tools

Search this Thread

Mar 15, 2007 | 06:32 AM

skunked

Thread Starter

New User

Joined: Sep 2006

Posts: 7

Likes: 0

Dual tanks question

I have a 97 f250 psd w/ dual tanks and need to know where they join, is it at the lift pump or is there somewhere else that they join?

Mar 15, 2007 | 06:50 AM

Cuda_jim

Post Fiend

Joined: Oct 2003

Posts: 5,903

Likes: 1

From: MICHIGAN

Inside the frame rail under your butt (drivers seat). It's called a selector valve, it switches from front to rear tanks

Mar 15, 2007 | 07:27 AM

skunked

Thread Starter

New User

Joined: Sep 2006

Posts: 7

Likes: 0

Okay, and from the selector valve it is a single line to the lift pump? Reason I ask is I am trying to pinpoint a fuel leak and it seems to be more when I am using the front tank.

Mar 15, 2007 | 08:05 AM

14psd

Senior User

Joined: Mar 2006

Posts: 435

Likes: 1

From: troy, Mo

yup single line to and from lift pump. Leaks SUCK!

Mar 15, 2007 | 09:14 AM

Cuda_jim

Post Fiend

Joined: Oct 2003

Posts: 5,903

Likes: 1

From: MICHIGAN

More description of the leak may help. Where does the leak seem to be coming from?

Mar 15, 2007 | 11:35 AM

skunked

Thread Starter

New User

Joined: Sep 2006

Posts: 7

Likes: 0

So what are the two lines off my lift pump?

Mar 15, 2007 | 03:21 PM

250turbo

Senior User

Joined: Dec 2005

Posts: 425

Likes: 2

From: anaheim,ca.

return line

Trending Topics

vintage pics of days gone by

17.8k

1.7M
Familiar Boom and Found This

28

726
About to give up on my 450, looking for suggestions

18

504
Seeking tailgate hinge bushings 1980 F250

17

295
7.3 or/vs 6.7

30

1.3k

Mar 15, 2007 | 10:35 PM

444dieselrod

Posting Guru

Joined: Aug 2004

Posts: 2,417

Likes: 4

From: Braham MN

if you looking down at your lift pump from the top of the engine, there will be two lines, the one on the right is the suction from the tank, the one on the left feeds from the pump to the filter, there is also one below these two that feeds from the filter to the pump again where it goes through the pump and into the back of the heads, these truck run a dual stage pump, diaphram on top, and a piston pump on bottom.

does it leak while running or when shut off??? and where is it leaking, there is also a return line from the regulator on the side of the filter housing that runs down to the selector valve that could be leaking too.

Diesel Rod

FTE Stories

Ford Trucks for Ford Truck Enthusiasts

This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level

Verdad Gallardo

Top 10 Fords at 2026 Carlisle Ford Nationals

Joe Kucinski

3 Best / 3 Worst Parts of Modern Ford Ownership

Brett Foote

10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

Pouria Savadkouei

Every 2026 Ford Engine Explained

Brett Foote

10 Ugly Ford Trucks That We Still Kinda Love

Joe Kucinski

10 Things Every Truck Owner NEEDS (2026 Edition)

Michael S. Palmer

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

Verdad Gallardo

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

Joe Kucinski

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

Brett Foote

Mar 16, 2007 | 06:57 AM

skunked

Thread Starter

New User

Joined: Sep 2006

Posts: 7

Likes: 0

I can't really tell where it is leaking from, seems to be from one of the above mentioned areas, fuel will collect on the top of the engine, can you use some of that UV leak stuff on fuel?

Mar 16, 2007 | 08:07 AM

#10

Cuda_jim

Post Fiend

Joined: Oct 2003

Posts: 5,903

Likes: 1

From: MICHIGAN

Not sure about UV leak detection but...the Fuel pump weep hole is hard to see. I'll bet that's your leak.

Clean the engine valley real good. Get lots of light and mirrors, restart the engine and start your search by looking at the bottom of the fuel pump where it enters the block.

Apr 2, 2007 | 02:27 PM

#11

tulalipjames

New User

Joined: Mar 2007

Posts: 1

Likes: 0

FYI - I had fuel leak with fuel collecting on top of 96 7.3, then running down back of engine. Dealer said a small plastic part had broken loose from side of the fuel assembly on top of engine, and I had to replace entire assembly for about $600. Took my F250 to a private shop, they said sorry they only worked on big trucks. Thought I finally had one. They recommended another shop, where Dave (now retired, unfortunately) put a hose clamp around the assembly to hold the loose part tight. Has worked fine for 6 or 7 years.