I have a Bobcat with a Kubota V1702 engine, about three years ado I was having a problem with it wanting to die out on me. That problem seemed to fixed itself as it had been running trouble free for the last three years until today. The problem has come back, I have checked the fuel lines, the fuel pickup tube in the fuel tank, replaced the fuel filter, and replaced the lift pump. When you open the lines at the injectors there is air in them, they will not completely bleed (the fuel will have air bubbles in it). After all that I pulled the fuel supply line off from the injector pump, and it shot fuel everywhere, so the injector pump is getting plenty of fuel. Is there a filter of some sort at the inlet of the injector pump? or is the injector pump going to need a rebuild?