yeah its knocking, bought it this way so i changed the injectors and swapped them around also delivery valves cleaned, swapped around and even swapped one from another vehicle, vac pump removed and bearings replaced, diesel purge and checked prechamber for ball in place i also adjusted the valves twice. next i guess is remove chamber and scope the cylinder.
any other ideas?
Steve
oh the video
https://youtu.be/V2LBAhjPZQs