Truck died Sat. No fuel at filter. Minus 14C that day thought maybe water or fuel gelled in tank. Got some PS 911 put that in and let it sit. Truck started after cranking for awhile. Open bleeder on filter truck died. I had a new lift pump so I put that in. Gas station parking lot snowing and blowing wasn't fun. New lift pump got fuel to filter and away I went. Thought my problem was solved. Truck started bucking on the highway so I pulled off and open t-valve. No fuel. Can hear pump running. So anyway after searching for awhile I'm guessing I got s**t in my tank sock. What you guys think. Also is it worth blowing air back through the line to clear and how much pressure should I use. Has anyone cut a hole in the box to get at top of tank. I need this thing fixed quick so I can make it to grannys for Christmas.

Are you sure it's bad fuel ? if it keeps losing it's prime so to speak , it's sucking air from somewhere ? when you open the bleeder on top of the filter what does the fuel look like ? is it bubbly ? or just pure fuel ? being in TO , your truck is in salt every winter the fuel lines going from the lift pump to the tank , could be rotten , and letting the lift pump suck air instead of fuel ? Start at the engine and work back to the tank , if there's a leak from the lift pump to the engine fuel should leak out , this is the pressue side , from the lift pump to the tank is the suction side , if the fuel lines are bad from the lift pump to the tank it will actually suck air before you will see a magor leak , the lines transition to rubber before the tank they tend to leak there as well , I have run in to this a lot , Im' located in London , but I am not saying that this is your problem , it could be , but I would start wiht the fuel if you believe this is your problem .

When i jumper the lift pump it flows out clean no bubbles. The fuels from esso. With the truck running I don't get any fuel out the bleeder. On the highway under load it stumbles like it's lacking fuel. So yeah I figure the supply problem is lift pump back. Will check the lines but I guess I'm going to have to drop the tank anyway. Was in Waterloo today what a mess. Guess it was just as bad or worse out there eh.

having this issue on my dodge and a lot of our big rigs at work, but its -30's here. most of them are water in the fuel filter and its freezing up and blocking flow to the ip. if we can get the filters warmed up they keep going till we can get them in the shop to change them out

If you get good clean fuel when you jumper the lift pump it might be the OPS.

Sounds JUST like my problem. Im changing out my OPS hopefully on Friday with my OPS socket I found! If I keep getting air in the fuel lines, then Im doing a thorough search of the fuel lines from the Lift Pump to the Tank. I dont have any fuel leaks (if I did, I would see spots on my dads spotless driveway).

One thing to check, is your lift pump still running for a couple of seconds after you shut the truck off? If not then it could be your OPS. My doesn't which led me to a bad OPS and I noticed that whenever my oil pressure meter jumped up to 40psi, I would get a uncontrolled spurt of power. Whenever it stayed still, my truck would run fine.

Ok I took the fuel line off pre lift pump. Very little fuel coming out so I took the air line, turned the pressure way down and blew her out. When I let off the air, fuel started pissing out. Now I'm covered in diesel. Good flow at bleeder and t-valve. So anyway problem solved for now. But I don't know if I blew off the sock or whatever crap was plugging it. Oh yeah read in another post to make sure to take fuel cap off before blowing it out. Guess what I forgot to do. Pressurized tank really pumps out the fuel.

Yeah pressure alright, if it was a gas tank you wouldve made yourself a nice little bomb. lol Btw, if you have a bedliner you can cut a hole in the bed, my old boss did it on his gassers all the time. You just have to measure from the bed a proper lenght, somwhere under there is a crossmember, we hit that on a junk truck once, ouch. Just cant set anything heavy on that spot from now on. I replaced my tank but im so anal that i have to do things without damaging others. So i dropped it manually. Sucks, but my bed is still structurally intact.