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My '73 is the same way. I've found that the older style gas pumps work better than the newest convenience stores. I have to hold the nozzle all the way in and have the handle rotated to about 8:00 position and can only have it on 1/2 to 3/4. And I HAVE to hold it the whole time. I've tried hooking it and proping it up, but it's fallen out a couple times, I'd rather be cold than in an explosion...
This is why I have a '78 box that is waiting to be painted and installed on my pickup. It has the fuel doors which changed the angle of the fill tube and made it easier to fill - like a newer vehicle.
If it really bothers you, you could get a new box, or have a body shop install a box side or fuel door setup for a '78-'79 onto your exhisting box.
hmmm... good idea. I just had a friend mention the moving the intake higher on the bed. Right now, they're below the mid-trim, and have a strange angle downward. If I move them above the trim, I'd have a better angle and more room to fill it up.
Anybody have a guess as to how much it would cost to move two tank pipes up a foot or two? I don't need a pretty fix on the old holes, since my beast is ugly and I like it that way.
The filler hose is to allow the gasoline to get in.
The Vent hose in a different place allows the tank to vent.
There is also an overflow tube that allows Expensive gasoline to run on to the pavement because the tank was filled too much and the Temperature outside rose, causing expansion of the fuel.
So, the filler hose can be constricted... and I can diagnose this by inserting a two foot long piece of 2 inch hose.
The vent hose can also be constricted... and I can diagnose this by looking at it for signs of collapsing.
And, the overflow hose is a life saver, but a pocket denter when it comes to heat and a full tank.
That about right?
By the way, where's the best place to get a step-by-step diagnostic/maintenance manual for this truck? I think I'm gonna need to learn how to figure this thing out on my own.
The vent hose is on the top of the fuel tank.
This can be plugged off at the end where road grime takes over.
By shoving the garden hose into the fuel filler hose you can determine if the fuel filler hose has collapsed.
If the garden hose goes in an out without restriction,the filler hose hasn't collasped and is not the problem.
I feel the problem is the design, therefore,people do the 78+ Box swap.
If you don't like to haule 5 books around you can purchase a CDRom version of the Ford original Shop manual at our store. motorhaven.autoanything.com
The CDrom also includes wiring diagrams,brochure,Happenings trivia for that year.
Might look a little strange doing it, but you could lug around a couple of 4x4 blocks with bevels to drive up on to raise the side of the truck the fill pipes are on.
I don't do this, but I have seen it done.
Also pump with the opposite side going downhill at the filling station, if possible.
I have a 76 f350 supercabthat i have owned since 2000. The first few times of gassing up i had the same problem. I found that it has to do with the angle of the gas nozzle. Some of the newer pumps use a nozzle that does not work well with my ford. In these cases I have to pump slow with the nozzle pulled out to about half way in the filler pipe. I just keep a close eye on it and when it starts to overflow out, I slow down on the pump. Now I have found that nozzles are different from gas station to station, and even from pump to pump. I have found one pump at a Exxon station that works perfect. I can pump full speed with no problems. But other pumps at the same station will not work as well. The bottom line is look around and find something that will work for you. It will be cheaper than modifing your truck.
charley
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