So this may only be me and maybe I'm the only one that don't know but. When I go to fuel up the fuel foams up real bad and either it shuts off the pump or the foam/fuel over flows?

 

IIRC it's just the nature of diesel fuel to foam. Although taking some fill neck tubes apart I have seen a 2 piece design that looks like it would cause some restriction if the alignment of it gets messed with. Mine does it bad on my rear tank

 

X2^^^ My rear tank, you have to get the nozzle in there just plum and perfect to keep it from shutting off as soon as you start it. It fuzzles up, 1) due to its nature, as Dirty said, and 2) the way our filler necks are made.

 

I find it helps if the place I park when fueling up is slightly downhill, pass side of truck lower. I hold the nozzle up instead of letting it hang there, and only stick it in about an inch.

 

My front tank won't even take fuel on the first notch of most fuel nozzles, have to stand there and hold it but the rear will take it on the first notch only to cut off early, then you can put usually 3-4 more gallons in it SLOWLY
Now my 95 Dodge will fill completetly using the truck nozzles on high

 

I don't have any problems

Maybe the vent line is plugged or rotten.

I have a '75 Scout II. One of the big problems with these trucks is the fuel handle will keep kicking off unless the truck is fueled very slowly.

Those trucks have the fuel filler line and a separate vent line. The vent line would eventually sag and will sit lower then the fuel filler line. These are easily seen looking up behind the quarter panel. When that happens, fuel gets into the vent line and prevents venting. I simply raised my vent line above the fuel filler line. I can fuel at full speed.

 

gotta be a vent problem. i fill mine with the high-flow trucker nozzles at full speed no problem

most of our trucks have a little plastic vent line inside the main filler neck, and its prone to getting disconnected or broken when someone takes the filler neck apart to drop the tank or whatever.

 

I'm gunna check out this theory, makes sence to me. And my dumb **** just put the bed back on.

 

well at least the bed bolts are fresh and should be easy to pull back off if you need to
it is possible to get the filler apart with the bed in place, but it is a bit of a PITA, and fighting this may have caused a previous worker to screw up the vent tubing

 

i have yo use the small tube nozzle pumps on all my trucks. if i use the large tube nozzle pumps, it will just foam up.
here in Jersey, the large tube nozzle pumps are high flow, the small tube nozzle pumps are low flow.

if i remember correctly the large nozzle pumps are 15 gallon per minute and the small nozzle pumps are 5 gallon per minute

 

Must be a vent problem as well, my van can get the high flow semi truck pumps no problem, while my F250 and the motorhome, can't really take those. The vent tubes on my van all look new and bigger than stock, so someone surely must of cured that problem.

 

I find on my truck that I can adjust the depth of how far I put the nozzle in so that I can get it on the first or second notch. By accident when I pulled up a little off center so that I had to stretch the hose a bit, it cocked the nozzle a little to the side and it went in full speed. Hard to duplicate though.

 

i think it's a pre-9th gen thing.
i can fill up without issue even with my filler tube just layed down almost even with my frame under my flatbed.
no problem with the big rig nozzles but the fuel foams up so bad from going so fast,that you'd have to wait longer for it to settle than if you just use the reg truck nozzle,so i stick to those for more accurate fills.

 

I cant see where the little vent tubes could have anything to do with it. The tank vents through the filler neck when refueling. A little 1/4" hose can't flow enough air out to equal what the volume of fuel going in.

 

Not that vent, there should be an additional 5/8" vent line run alongside the main filler line.