Diesel Engine Issue

ENGINE STARTS GREAT, BUT WILL ONLY GAIN A FEW HUNDRED RPM THEN SLOWLY DIES WITH THROTTLE WIDE OPEN. WILL RUN FASTER IF THE GOVERNOR IS HELD OPEN YET WILL SLOWLY DIE. LET IT SET A COUPLE OF MINUTES AND STARTS RIGHT UP WITH THE SAME PROBLEM OF DYING. I'VE REPLACED BOTH FILTERS, REMOVED AND CLEANED ALL INLET FUEL LINES FROM TANK TO PUMP. SAME PROBLEM. IS THERE A SCREEN FILTER INSIDE THE PUMP INLET PORT? IT STARTS GREAT, JUST WON'T CONTINUE TO RUN. I"M AT MY WITS END.

Ron

Sounds like the plastic governor damper ring deep inside the pump has become brittle, and distintegrated, and pieces of it are jammed in the housing pressure regulator valve/return fitting that screws into the punp cover.

(This, or any other obstruction in the fuel return circuit will cause the engine to shutdown, as his is doing.)

Removing the fitting/valve and cleaning it out SHOULD allow it to start and run, but get the pump OH'd because as the plastic ring completely fails, the metal parts it isolates will bang together, causing wear and metal filings in the pump.

Take a break, have lunch, then do something else and it'll come to you.

Thanks again

Ron