I'm thinking injection pump
I thought of that but he said it will run for a minute but would not hurt to see if oil pressure guage goes up wile crankingAny chance that the engine doesnt build up oil pressure in order to release the fuel pump rack?
Not eddie's problem. But I had this easy fix once. Blew back the line from injector pump to tank. Of course after plenty of head scratching and dead ends. Used a portable air tank.No way to put some air pressure back through the line or in the tank ? Also are you certain you don’t have the square glass filter somewhere along the line ?