Tank is getting dropped this weekend..but in the mean time..this is what it's doing...once the tank gets to half empty.. the truck run out of fuel... anyone ever seen this.??.. what do you think I will find when I pull the pump? From looking at the exploded view.. I cant tell ..but I think I will find a hole in the line inside the housing...an when the fuel gets below the hole..it just pumps it back in tank?... anyone wanna guess...???

 

What kind of MPG are you getting? It could just be a bad sending unit.

 

mileage is normal for a truck 10 to 15 mpg..depending on road..I know the sending unit it reading correct.. when I fill up it only takes bout 12 to 15 gallons..
I had posted this question before..but have just lived with it for a year or 2.. this weekend will know for sure.. .. just never seen anyone with same problem.. an it sucks to have half tank of gas..i never get to use..lol

 

Our tanks are either 26 or 35 gallons if I'm not mistaken. So for you to have a full tank with only 12 to 15 gallons...well, something's up!

 

Exactly...lol...she goes down to bout half needle from half tank..an like clock work..she will run out of gas... I have never seen the low gas light..lmao..I carry a 5 gal can in back..lol..cause sometimes..I forget..an run out at the dumbest placed.. lol

 

this is out there but is your filler neck leaking? my buddys filler neck rusted through and a pice of the rust clogged the fuel pump. Whenwe dropped the tank it was rust, cleaned the tank, and from what hes told me its ran fine since.

 

Plastic tank ..pump works great till it hits half tank..lol

 

check all your wiring just in case

 

What you describe could be the scenario. Just go get a new sending unit so you can put it in when you drop the tank. You can't do much on the sending units.

 

Mine did the same thing.Bad fuel pump.Check the fuel pressure to be sure.