trouble refueling
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Freshman User
Joined: Jan 2012
Posts: 44
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From: Plattsmouth, Ne
yeah, that's why I'm thinking that there's some gas or something built up in the vent line (where the 'trap'/bend is), because when I do refuel, there's a lot of bubbling going on as if there's no vent and the air is trying to get out of the tank through the inlet instead of the vent.
It's looking like tomorrow now I'll be checking it out. Working 12 hrs shifts is great for having time off, but no time to do anything on the days you do work...lol
It's looking like tomorrow now I'll be checking it out. Working 12 hrs shifts is great for having time off, but no time to do anything on the days you do work...lol
Elder User
Joined: Jul 2011
Posts: 609
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From: Stockholm, NJ
Unless of course you're like me and already did that once. I've since replaced the entire fuel system in my truck. I have no more gunk to suck up. (sometimes I over react) 
Look and make sure fill tube has no up slope in it. Here's a little known fact. The big tube you see from the out side is actually the vent tube. The fill tube is the smaller 1" line that goes through the middle of the outer fill tube. The idea is that gas flows through the smaller hose and dumps right into the tank. The vapor then escapes through the larger hole around the fill tube. If the fill hose was cut short at some point, it will cause a back up. If this is the case, the best thing to do is either find another fill hose and replace it, or cut it out completely and fill it at half speed at the gas station.
Look and make sure fill tube has no up slope in it. Here's a little known fact. The big tube you see from the out side is actually the vent tube. The fill tube is the smaller 1" line that goes through the middle of the outer fill tube. The idea is that gas flows through the smaller hose and dumps right into the tank. The vapor then escapes through the larger hole around the fill tube. If the fill hose was cut short at some point, it will cause a back up. If this is the case, the best thing to do is either find another fill hose and replace it, or cut it out completely and fill it at half speed at the gas station.
Does it matter if the smaller hose goes under or over the bigger one? On the fuel tank, the smaller hose attaches to the right side, but on the filler neck it attaches to the left, so it crosses over.
Thanks
Frank
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Freshman User
Joined: Jan 2012
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From: Plattsmouth, Ne
I'm having the exact same problem ever since input a 38 gal tank in the truck and I have new hoses. If I understand the above post, the big hose is not for flowing fuel, but is the vent? So in OldStyle's photo, the red hose is where gas flows and only vapors come through the black hose? That doesn't seem right. When I put new gas hoses on my truck, the smaller hose did not run through the bigger one. I'm very confused.
Does it matter if the smaller hose goes under or over the bigger one? On the fuel tank, the smaller hose attaches to the right side, but on the filler neck it attaches to the left, so it crosses over.
Thanks
Frank
Does it matter if the smaller hose goes under or over the bigger one? On the fuel tank, the smaller hose attaches to the right side, but on the filler neck it attaches to the left, so it crosses over.
Thanks
Frank
Why does the hose switch sides?? Are you sure you have the right neck? Do you have 2 tanks in your truck or 1? I'm wondering if you have a neck from a 2 tank vehicle and that's a rear tank neck...hmm
Posting Guru
Joined: Mar 2009
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From: Alabama
I changed out my entire fuel system last year...on my '78 the Larger hose was for fuel, the smaller was for the vent...The vent tube was on the left and the filler tube was in the middle (or right)...
If your going to blow it out, remember to put a rag over the filler neck, otherwise you will get a face full of gas!
If your going to blow it out, remember to put a rag over the filler neck, otherwise you will get a face full of gas!
Freshman User
Joined: Nov 2009
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I had a similar problem with my '78 F100 a few years ago... fuel would back up and bubble ...and leak when I'd turn a corner. Hmm...
Filler tube, being original equipment, had finally got old and was going to shreds. And like someone else's in this thread, it was just a single hose, no 2nd tube inside or beside it. We couldn't find a replacement for love nor money, so now it has a length of plain 2" hose (I think it was water hose) which does the job just fine, tho it looks kinked where it goes over the tank -- must be plenty big even flattened down like that.
Dropping the tank wasn't a huge job, probably took longer to siphon the fuel out and back than for everything else.
As a side benefit, the gas gauge now works again... for years it had only worked for a few months after I'd driven through a big puddle!!
Filler tube, being original equipment, had finally got old and was going to shreds. And like someone else's in this thread, it was just a single hose, no 2nd tube inside or beside it. We couldn't find a replacement for love nor money, so now it has a length of plain 2" hose (I think it was water hose) which does the job just fine, tho it looks kinked where it goes over the tank -- must be plenty big even flattened down like that.
Dropping the tank wasn't a huge job, probably took longer to siphon the fuel out and back than for everything else.
As a side benefit, the gas gauge now works again... for years it had only worked for a few months after I'd driven through a big puddle!!
Posting Guru
Joined: Mar 2009
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From: Alabama
A quick way to drain the fuel (I figured out, after dropping mine 4-5x's trying to figure out an issue)...disconnect it at the pump, and use a siphon to start the draw, then just let it drain...park it so the rear end is higher than the pump, or just use a jack to raise the rear end...makes it a lot easier, and you don't have to try and force it through the "flattened" part...
Elder User
Joined: Jul 2011
Posts: 609
Likes: 1
From: Stockholm, NJ
Well, if at all possible, keep it above, go around the top. You don't want to give anything the opportunity to stay in the vent line.. ie; gas. If you keep it above, the gas will always flow down and there won't be any 'traps' for it to linger.
Why does the hose switch sides?? Are you sure you have the right neck? Do you have 2 tanks in your truck or 1? I'm wondering if you have a neck from a 2 tank vehicle and that's a rear tank neck...hmm
Why does the hose switch sides?? Are you sure you have the right neck? Do you have 2 tanks in your truck or 1? I'm wondering if you have a neck from a 2 tank vehicle and that's a rear tank neck...hmm
Thanks
Frank
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Elder User
Joined: Oct 2009
Posts: 871
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From: New Albany, MS
Ok folks, I figure I'll give my redneck input.
The big hose is how the the majority of the gas gets into the tank.
I have had this problem before. The stock large hose often collapses, so to permanently fix this I just shoved a 1 inch galvanized piece of pipe in the larger hose where it crosses the frame. It is a little tougher to do than the hose clamp method, but it doesn't risk any abrasion of the rubber hose, so you can take that for what it's worth.
The big hose is how the the majority of the gas gets into the tank.
I have had this problem before. The stock large hose often collapses, so to permanently fix this I just shoved a 1 inch galvanized piece of pipe in the larger hose where it crosses the frame. It is a little tougher to do than the hose clamp method, but it doesn't risk any abrasion of the rubber hose, so you can take that for what it's worth.
Elder User
Joined: Aug 2011
Posts: 685
Likes: 0
From: Cape Coral, Florida
So we have an old rubber fill and vent hose also rubber fuel line from tank to metal line at frame, maybe even gunk in your tank! add fuel with ethanol that destroys rubber... see where i'm going. That tank is just begging for you to pull it,clean it and replace the hoses , I bet when done you'll be able to fill it too! Until you do this it will always be a big????? Just great low cost insurance... just my 2 pennies..
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