Fuel filter is new. I’ve been taking it off and dumping atf in it. We limped it 5 miles and a buddy is gonna tow it to my garage. Every time when it dies the fuel filter is down 1/4 of an inch. But it being a 6.9 the water separator was totally full? Truck is almost full tank wise.
I’m guessing that the return line from the first cylinder on the passenger side that goes up to the top of the fuel filter is sucking air bad. It’s just weird that the water separator is full but the fuel filter isn’t.
How does the lines go on a 6.9?
Is it tank, water separator, lift pump, then fuel filter and ip?