Car arrived running but was hard to start for customer after not using it for a few days, glow plug, eml also lit.
Code read and found codes present,
185 combustion cyl 3 stored.
694 cyl 3 injection circuit open current.
473 preheater plug circuit stored, came up later after some testing.

After removing connectors from injectors and checking all appeared well, removing a heater plug and attempting compression test on cyl 3 (which likely stored 473) vehicle now runs only on 3 cylinders, and will not rev except if started with throttle, but still missfires, thought we had injector fault as this car has already had one fitted, cyl 1 french style!
Fitted new injector to dodgey cyl, this has not altered anything!
Checked for continuity of feed cables, all seems well, I dont know if this would work , but i have tried leaving new injector fitted but plumbing in and connecting old one, no fuel at all came out!
Have i missed something?
I should think so!
Any help welcome, thanks Phrom fill