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Is it a lift pump or injectors?
So I was driving down the highway yesterday and all of a sudden the truck loses power. I mean I was having a hard time maintaining 35 sometimes. I did have vege oil in the tank so I figured the mix was a little thick so I stopped and topped off the tank with diesel and the truck drove fine for a few miles and I lost power again. I stopped for a couple minutes and then the truck drove great for a few minutes again. It did that the whole trip.
So today i drained most of the tank and filled it up with diesel and it ran great, more a while.  The truck seems like its starving for fuel. When its acting up the injectors sound really funny and the truck will shake something fierce.
To drain the tank I just hot wired the lift pump and pumped the tank into buckets. But the lift pump didnt seem to pump consitantly. And when I reversed the pump to see if anything was stuck on the sender screen it would pump alot faster. And I have changed the fuel filter
Any help would be greatly apprectiated
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03 F-350 DRW Lariat 7.3 6 4x4-Speed 4 inch ProComp lift, BFG AT LT315/75R16, 3 in. spacer between duals.
Banks Monster Exhaust, w/Turbo Elbow, AFE Stage 2 Cold Air Kit
DP 80econ,80tow
2 Optima Red Tops
8,200lbs---Cat Scale---Thats me and and 38 Gallons of diesel
1987 Mustang GT Cobra Clone- crate motor, and more suspension than I know what to do with
1995 Thunderbird SuperCoupe-AT, Cat Back, 73mm MAS, KNN Cone Filter
99 F-350 DRW Lariat 7.3 Auto 4x4- 280k,DP handheld tuner  , Wrecked in Springfield, Missouri  RIP, you will be missed!
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