12.7 questions

The pump pumps volume, the return fitting is restricted, to create pressure in the head, for injectors. So unless the whole system is sealed, hoses all connected, and tanks pressurize to push fuel into system, air will keep it from working..Mine has a check valve. When I changed compressor and fuel pump, no need to prime. But when I changed injector, because I drained fuel from head, by removing supply ( bottom hose) from head. I lost prime. I hate to beat a dead horse, but unless the whole system is sealed, then tanks are pressurized. Fuel will not make the trip. The head holds a lot of fuel. It’s not enough to just push fuel to filters lines etc. As in my case, they were never drained, only the head. All the cranking in the world wouldn’t start it, (5 hrs) I tried. Pressurized tanks. And Bam!!! Fired righ up.

 

The only other thing that comes to mind, is the shut off valve on dual tanks, are known for problems. I’ve never had a problem, but have heard of a few, who actually eliminated the valve altogether and piped in a flow through T in its place. Sounds like you have fuel flow from the tanks, though. Just a thought. Gotta push fuel through the whole system in volume, to get it to continue flowing. Siphoning effect takes place. And fuel will be able to be pumped ( drawn) from tanks.

 

That’s the idea!!! I’ve been saying half a dozen ways. System needs to be all buttoned up, first. Pressure will prime everything, that’s the idea. Push volume of fuel through, displaces all the air. Must have a Closed system first then pressurized