temporary engine miss at start up

[jim743]

743B with V1702 Kubota, the longer it sits, the worse it gets. At times it may run for a 60-90 seconds on three cylinders, then beings to kick a few times till finally runs on all 4. Then runs fine. Seem worse in colder weather. Glow plugs are all working. The injectors had been replace a while ago, the pump has not been touched since I have had it (10 years). Bought it with a busted hour meter, so not idea of the hours on the pump. Engine has been rebuilt 300 hour ago. Does this sound like a faulty injector? Bad pump? I suspect the injector is bleeding into the cylinder head, or fuel is draining back to the injection punp. What is the best method to pin point this issue? Thanks

 

[foton]

sounds like a injector to me, the only thing I can think of is to take them out to a diesel shop or do a spray pattern test yourself, be careful if you do a spray test.