whys my 06 6.0L 38gal tank only take 30 to Fill?

[RamAirfreak98ss]

Ive had it "empty" 3 times.. I mean the thing beeps, saysy i only have 50~ miles to go, even had my g/f run it down till 8 miles left. I went to fill up, before the pump hits 30 gallons, the "foam" from filling the diesel fast fills up the filler spout in the truck and triggers the pump to stop.

I try to "top it off" best i can, the most ive ever gotten in the thing is 32.xx gallons, not even close to 33 out of a 38 gallon tank? wtf?

Was there any smaller tanks that possibly my 06 diesel, fully loaded lariat, long bed extended cab fx4 would have had in it from the factory? I want that 58 gallon "plastic" one online thats like $900 but i figured 38 gallons should be enough.

My 91 f150 has two gas tanks, 17~ gallons for one and 18-19 for the other. If i empty one and have a couple left in the 2nd tank i can get 36 gallons in it easy.





Id love to be able to tow from NJ to Ohio with one tank
How many gallons do you guys tank on fillups?

[Logan]

It takes a while from me once it first kick off. But, I can usually get anywhere from 5-7 gallons more in once it does kick off. It is real slow going, but you can do it. I usually just barley hold it open. Also, if you are trying to fill up with the big truck pumps, it makes it a good deal harder. Hope that helps.

[vitalidle]

Yeah its a real bugger. Mine is supposed to be a 29 gallon tank and it usually shuts off at 25 gals and I have gotten 32 in it. I guess its a safety feature put in the gas tanks so in case of a rollover accident the tank won't leak fuel. You can elemininate the slow fill up with the harpoon mod.

[stump0331]

that foam is a pain, there is a mod called the harpoon mod that allows you to fill to the top without foam

[DKR]

OK...where's this link to the "harpoon" mod? I am curious.

[vitalidle]

Here is a link. Click on hutch mod and there is a link for the harpoon mod there.Welcome to guzzle's Ford PSD Web Page

[DKR]

Thanx Vitalidle! 'preciate it!

[vitalidle]

You betcha

[Clay Henry]

When your meter says you have 8 miles till empty, you probably have another 3 or 4 gallons of fuel in it. This is the way mine is - i found this out the hard way once...though for sure i would run out of fuel and i had no where to fill up so i kept driving and it kept running...I put 37 gallons in it when i finally found a pump and the needle was way below the red.

[Logan]

Yeah, but what he does not tell you is that he has 100 extra gallons of vegi in the bed

Dont go by the lie-o-meter 100%. I have been reading 0 miles till empty before, and put in 40+ gallons. I think it is different for each truck. So, the best thing to do is know your truck, and how it normally runs, and how many miles you can safely get per tank.