Leking fuel at the rear tank

[TygreII]

I noticed the other day that my truck was starting to leave puddles of fuel at the rear axle. Sometimes they were large puddles. I swiched to the front tank and stopped using the rear. I figure that this is my recent har starting issue. I believe that I may have to go through my back half of the fuel system.

This will be mostly a project thread, but if anyone has any hints or tips, that would be great.

 

[Nero]

If you sit under the truck and look backwards you can see the pickup tube assembly on the top of the tank, it's easy enough to see if the leak is in that area.

 

[Jesus Freak]

Its probably the tank itself.

 

[catbird7]

Considering where you live do yourself a favor and replace the tank with a plastic one. This will also require buying gasser sending units which are much easier to locate because they were much more common. Buy the assembly minus the intank fuel pump. Very reasonably priced as compared to the original diesel parts that are often difficult to find.

 

[Jesus Freak]

Considering where you live do yourself a favor and replace the tank with a plastic one. This will also require buying gasser sending units which are much easier to locate because they were much more common. Buy the assembly minus the intank fuel pump. Very reasonably priced as compared to the original diesel parts that are often difficult to find.

Good call.....

 

[IDIBRONCO]

I don't think that a leaking fuel tank could cause hard starting issues. I would suspect the FSV (fuel selector valve) first.

 

[Lumberjackchuck]

I had a slight leak from my rear tank. Ended up replacing both the front and rear with plastic tanks from gas depot. The rear tank was a disaster, there was so much rust floating inside of it.

I also replaced the fuel lines, bent 3/8” stainless lines along the frame with 6AN whips to the tank and FSV.

Don’t do what I did, get the 38 gallon rear tank and delete the FSV.

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[Brian VT]

I'm gonna pull my bed off one of these days and try to sort mine out.
I had FSV issues just after I got the truck so, in a rush, I had it towed and had the guy bypass all of that and I've just been running direct from the front tank since then. The fuel gauge doesn't work so I fill up @ 100 miles just to be safe.
My rear tank is still full of fuel that I can't access.
I don't want to give up the spare tire storage for a 38 gallon rear tank
I'd love to have the FSV system back but it sounds like having it reliable is a pipe dream anymore.
So, if I ever dig into this my goal is to at least have a working fuel gauge for the front tank and maybe an electric pump to move fuel from the rear tank to the front as needed.
So...you all can look forward to my posts here when I attempt to make that all happen. lol

 

[Kdo58]

I was pulling my rear tank and it started leaking under the strap. 38 gallon tank and a sump is the way to go.

 

[IDIBRONCO]

So, if I ever dig into this my goal is to at least have a working fuel gauge for the front tank and maybe an electric pump to move fuel from the rear tank to the front as needed.

That's a good plan.

 

[Old Goat]

Considering where you live do yourself a favor and replace the tank with a plastic one. This will also require buying gasser sending units which are much easier to locate because they were much more common. Buy the assembly minus the intank fuel pump. Very reasonably priced as compared to the original diesel parts that are often difficult to find.

Make sure you have the correct OHM`s for your year of truck/Sender.

I used the Spectra F26E 38 Gal rear tank.
Throughly degreased the outside of it. treated it with Phosphoric acid, washed off the residue after it dried, 2 coats of POR, and a couple coats of bed Liner spray.

Did same to Straps, and gooped up the recessed area on the tank for the Straps, and Straps too, with RTV for a cushion.

Also slathered up the top of the new Senders with Anti-Seiz to cut any rust issues that might crop up.

Maybe it is different in the salty rust belt areas of the country, IDK.

The FSV has been a unreliable, short lived, constant problem P O S since it was first introduced.
number dummy over on FTE a retired Ford Parts manager mentioned that.

A good money maker for Ford with replacements.

Market is flooded with them now in the $50 +- range, Chicom replacements.

I run off the rear tank, deep 6`d the FSV, and it`s plumbed from tank to engine and back.
Can safely run 500 miles with a reserve to maybe 600?.
That changes being empty or loaded, and if you drive always down hill will increase your range.

Spare tire is mounted in the L/F corner with a Ford tire mount that was an option back in the day.
Kind of sorta like this LMC one. This one is for a 70`s something year truck.

In-Bed Tire Carrier - OEM Style

Shop from thousands of parts and accessories to help you restore, maintain, and customize your Chevrolet, GMC, Dodge or Ford truck or SUV. Keep 'em on the road with the right part, right price, right now.

www.lmctruck.com

Goat

 

[Old Goat]

Make sure you have the correct OHM`s for your year of truck/Sender.

I used the Spectra F26E 38 Gal rear tank.
Throughly degreased the outside of it. treated it with Phosphoric acid, washed off the residue after it dried, 2 coats of POR, and a couple coats of bed Liner spray.

Did same to Straps, and gooped up the recessed area on the tank for the Straps, and Straps too, with RTV for a cushion.

Also slathered up the top of the new Senders with Anti-Seiz to cut any rust issues that might crop up.

Maybe it is different in the salty rust belt areas of the country, IDK.

The FSV has been a unreliable, short lived, constant problem P O S since it was first introduced.
number dummy over on FTE a retired Ford Parts manager mentioned that.

A good money maker for Ford with replacements.

Market is flooded with them now in the $50 +- range, Chicom replacements.

I run off the rear tank, deep 6`d the FSV, and it`s plumbed from tank to engine and back.
Can safely run 500 miles with a reserve to maybe 600?.
That changes being empty or loaded, and if you drive always down hill will increase your range.

Spare tire is mounted in the L/F corner with a Ford tire mount that was an option back in the day.
Kind of sorta like this LMC one. This one is for a 70`s something year truck.

In-Bed Tire Carrier - OEM Style

Shop from thousands of parts and accessories to help you restore, maintain, and customize your Chevrolet, GMC, Dodge or Ford truck or SUV. Keep 'em on the road with the right part, right price, right now.

www.lmctruck.com

Here we go for the Bull Nose Forum

Spare Tire Carriers

From what I can see in the part numbers, below, there are three kinds of under-bed spare tire carriers: Without aft tank: EOTZ 1443-D shows to be for 1980 on, but as there was another ( E4TZ...

www.garysgaragemahal.com

# 1405 and 1407 is what I have, bought it off the guy I buy Fire Wood from. Gave him $20.
use a long bolt from the back side, made a cross piece that fits inside the wheel. 1/4" X 3" length of inside the rim. Drilled 3 holes. one for the long bolt. the other 2 line up with bolt holes in wheel. Drill holes and tapped them for bolt with same thread the Lug Nuts have. bolt it to the wheel. Drilled hole in long bolt for a pad Lock.
My tires are 235/85/16"


I must have hit "Quote" instead of "Edit".

Goat

 

[Old Goat]

How many of you remember the Camper Special back in the 70`s, with the side mount?

Did a Google search and this is the best I found.
came with a 140" WB. enjoy>

Didn`t see and "Cup Holders".

Ford Super Camper Specials are rare, unusual, and still cheap - Hagerty Media

The 1970s trucks were for serious outdoors-people.

www.hagerty.com

Goat

 

[tbowker]

I don't want to give up the spare tire storage for a 38 gallon rear tank

Can you post a picture of how the spare tire mounts under the rear tank? I have the skid plates mounted under my rear tank and can't seem to figure out how to mount the tire there. I presume there was some type of stock mount at one time. Leaving the spare bouncing around in the bed is irritating.

 

[tbowker]

Spare Tire Carriers

From what I can see in the part numbers, below, there are three kinds of under-bed spare tire carriers: Without aft tank: EOTZ 1443-D shows to be for 1980 on, but as there was another ( E4TZ...

www.garysgaragemahal.com

# 1405 and 1407 is what I have, bought it off the guy I buy Fire Wood from. Gave him $20.
use a long bolt from the back side, made a cross piece that fits inside the wheel. 1/4" X 3" length of inside the rim. Drilled 3 holes. one for the long bolt. the other 2 line up with bolt holes in wheel. Drill holes and tapped them for bolt with same thread the Lug Nuts have. bolt it to the wheel. Drilled hole in long bolt for a pad Lock.
My tires are 235/85/16"

I got all excited and fired off that previous question before reading a bit further where old goat answered the question already. Thanks for that post.