It has been my experience that most mechanical problems are actually simple ones. They can just be bears to diagnose. An example, I went to start my sprayer this spring to get it ready. It started, ran for a few minutes, started to miss and died and would not restart. So, always start with the simple things. Changed the fuel filters. Nope. Discovered a sediment bowl, cleaned it, no difference. Then moved on to the lift pump, seemed fine, pumping it by hand produced fuel at the fuel pump once we cracked the inlet hose. So then onto the fuel pump, cracked the six injector lines, no fuel coming out. OK so problem lies with fuel pump, right? Pull the injection pump, take to diesel engine place, they find a piece of plastic from the fuel pump timing locking pin had broken off. We were happy! Bring pump home, install, nothing! So leave problem for after seeding.
Pull pump again, take to diesel engine place for complete test, all is fine, pump is even considered to be in very good shape. Frustrated. Add external electric pump bypassing lift pump. Sprayer starts and runs! Reconnect original lift pump, starts, runs, stops..........reconnect external electric lift pump and it runs once again.
Lesson learned - while lift pump was pumping fuel, it was not of the volume/pressure necessary to operate the injection pump.
Solution, acquired new lift pump to hopefully be installed today! Cost - $110 vs the original $2400 we had been trying to spend for a rebuilt injection pump.....................thankfully at the time we couldn't find one either.
So here's hoping that Manny can wave his magic wand and bing bang boom it is a simple and inexpensive repair.
Good luck!!!!!
Cheers,
Garry