So my 580b was running while I was replacing the power steering cylinders and bleeding them, and it sputtered and died. I thought it ran out of fuel so I put more in it and opened the bleeder on the filter, I had fuel there so I cracked the supply line to the pump and had fuel there. I cracked an injector line on the pump and no fuel was coming out. So I cracked all 4 injector lines at the pump and cranked it untill the battery ran down in 15-20 second intervals. Never got fuel to the injector lines. I also took the return line off and removed the elbow and never saw fuel there either.... Not sure where to go next, there's full at the pump but none to the injector lines... Any ideas phil?