tank bypass
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New User
Joined: Nov 2015
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From: Seymour CT
tank bypass
Hi I am a new member I greatly appreciate the knowledge that is shared on this site. I need some of that. I am trying to get a 1994 ford f250 5.8 4 wheel drive back on the road after it has been sitting. Rear pump returns fuel to the front tank where the pump doesn't work. I will buy another pump for the front eventually but I would like to bypass the front tank for now by connecting the two lines that go to and from the front pump together by installing a fuel filter between them with the flow going from the return to the feed. Will it work to make the fuel return to the rear tank again like it should or will it build up too much pressure in the lines and cause other problems?
Postmaster
Joined: Nov 2011
Posts: 3,533
Likes: 17
From: SW Florida
No, if you do that the rear pump will just dump fuel back into the rear tank and you won't have any pressure available at the rail. The pumps are plumbed in parallel. All you need to do is plug the feed and return lines for the front tank and you'll be all set.
Here's some info: https://www.ford-trucks.com/forums/1...n-96-f150.html
Welcome to the site!
Here's some info: https://www.ford-trucks.com/forums/1...n-96-f150.html
Welcome to the site!
Postmaster
Joined: Nov 2011
Posts: 3,533
Likes: 17
From: SW Florida
You got a new pump or the entire FDM (Fuel Delivery Module)? The valves that are leaking are inside the FDM and ain't part of the pump itself.
Each FDM has an electric high pressure delivery pump, a venturi scavenge pump, a shuttle valve, and a check valve.
Each FDM has an electric high pressure delivery pump, a venturi scavenge pump, a shuttle valve, and a check valve.
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