What to do with breather fuel tank line?

[cnug]

Im new to the iron pig, but trying to get my 1971 fj55 fixed up. Recently someone tried to steal gas and cut my Vent hose going in my fuel tank. (They didn't get anything) Now, I don't know what to do with the new one that I put on. I hooked it to the gas tank in poked it in the grommet in the inside of the body, but that makes for a terribly strong gas smell inside the cab. I looked at the owner's manual schematic and cannot figure out where this line should connect. Thoughts?

 

[Dizzy]

Typically, the tank vent goes to a fuel/vapor separator, then to the charcoal canister, then the Vacuum Switching Valve, then the intake manifold. Mine, a '75 USA-spec 40, is currently vented to atmosphere, thru a filter where the VSV would go. Some folks talk about vented gas caps, so that could allow you to cap your hose, but not create low pressure as the tank empties.

 

[cnug]

Typically, the tank vent goes to a fuel/vapor separator, then to the charcoal canister, then the Vacuum Switching Valve, then the intake manifold. Mine, a '75 USA-spec 40, is currently vented to atmosphere, thru a filter where the VSV would go. Some folks talk about vented gas caps, so that could allow you to cap your hose, but not create low pressure as the tank empties.

Thanks Dizzy, sounds like you know your stuff!
I am looking at my Haynes Schematics but dont think any of them match my pig, once I poke it through the grommet I have no idea where to connect it next. Everything inside the panel looks connected, the vented cap sounds easy!! I could look around for one of those...

 

[Dizzy]

You may not have as many chambers in your tank for a '71 55? Therefore, the schematics and diagrams are a bit complex.

Look for the hard lines in/along the body and into the engine bay. Do you have a charcoal canister or VSV?

 

[cnug]

@Dizzy - The best I can tell that hose just clipped under the back of the bed as a breather, works fine. That is unless I fill the tank to the top, then gas pours out... If I leave it there I need to find some way of putting a filter or something on the end so dirt or whatever doesn't get in and fuel doesn't come out. You think a fuel filter just clipped to the end would work and not restrict air flow? Need some one way valve that lets air in, but no fuel out... That possible?

 

[Dizzy]

I'm trying to figure out why your tank's filler neck looks like, that with a couple of branches, and one branch forked with the red hose. On my rigs, the filler neck has a line that runs parallel, which I believe triggers the gas pump to shut off before you get splashed with fuel.

A quick Mud search allowed me to find an aftermarket two-way vented gas cap for what I believe is '72 and later style filler necks. Others have simply drilled a small hole into the gas cap itself

My first inclination would be to stick with the Toyota gas cap, and find a fuel check valve from any vehicle type in a scrap yard, then make a simple manifold/Fuel-Vapor-Seperator with off-the-shelf tees to hook it up to your tank's existing vapor plumbing, and run a line to a small air filter, like the kind used on hot rod valve covers, and have it plumbed into the engine bay by the bib/fender, where it gets air and lets vapor out. This way you don't have to deal with the cheap aftermarket vented gas cap, like I have on my Nissan, which needs replacement yearly because the rubber dissolves in ethanol vapor.