Quote Originally Posted by Dieseldude View Post
This is very unusual. Injection pumps don't normally rattle. Noise could be coming from some part of the engine, near the pump.

The rattle sound is more of like the sound a bicycle sprocket makes when you free-wheel it but is very audible. I tried moving the throttle by hand and the pulses of the rattle sound can be felt on the pump assembly.

Makes me wonder....