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when i'm driving around (2000 F350 7.3 Turbo extended van) it seems to run just fine. But when i'm going up the grade and ask it for some extra it starts acting like it's starving for fuel after 1000 feet . I back off the throttle and it seems to be ok.
I changed the fuel filter. it looked good . And it still does it.
I've been burning my own Bio for about 50,000 with no problems.
It has 188,000 miles on it.
What happens when you run pump dino in it? Do you have a fuel pressure gauge you can plumb into the bowl to see if there's too much of a drop? Mine tanks pretty good right now when I nail it (down into the low 30s -- stock pump can't keep up with my sticks ) and I don't notice any running issues like that.