So, I have a 1996 f250 7.3 bone stock, I ordered a new fuel pump for it because of fuel in the engine valley, but it ran pretty good. So the other night on my way home from my brother in laws, it started losing power like it was running out of fuel and eventually died. So I had my son pull me the rest of the way home. The next day I changed out the fuel pump and cleaned up the fuel bowl, and replaced all the lines. Replaced the fuel filter and filled the fuel bowl up about half way with fresh fuel. Took a bit of cranking, but it started up and ran and idled just fine......for about 10 minutes, then acted like it was running out of fuel and eventually died. Took the fuel bowl cap off and the fuel bowl barely had any fuel in it. So I filled halfway up again, and started it back up, same thing again. So then I thought that maybe there was a restriction in the fuel lines, i took off the fuel inlet line and blew it out with compressed air through both front and rear tanks. I could hear the air coming out the tanks because I took the caps off. Put everything back together, filled the fuel bowl halfway again, started it up and about 10 minutes later, same thing, acted like it was starved for fuel and died. Fuel bowl was empty. So my question is, does it usually take this much to get these pumps primed?