alright, my beloved oll truck <80 3/4 ton 4x4 350 q-jet 4-speed> has been through 3 fuel pumps lately the first 2 were thought to be ultra cheap quality but this new one is fine we thought the pump went out again, but we figured out that its not. it will run fine on an empty tank, i filled it up today ran good for about 5 minutes then it started its crap again like the fuel pump dont work. sit there and crank and crank nothing happens wait a few minutes prime the carb crank it and it'll spit just a tiny bit of fuel at a time just enough to keep it idling, and the filter is like empty. waited a few hours primed it cranked it over and the filter is full as it can be and truck runs good. what the hell!?!?!?!?! its making me mad ive been late for work a few times!