I see 14 is an advance corrector relay, so maybe the pump unit /is/ the mechanical injection pump after all. I dont have my 306 nearby to check, but I can recall extra wires going to the engine injection pump, compared to my old 405's. Quite a bit of extra complexity there. I guess it is possible that some xud 306 had more emissions stuff fitted for other countries also.
Edit: Yes, I found by google mention that the advance mechanism is for lucas pumps.
I will attach the equivalent diagram for a 405, and it has an advance relay too.
Interesting how the tacho sensor is referred to as a TDC sensor, maybe this could be used staticly to find top dead centre for no 1 (or 4 ).
Ronald
Edit: Yes, I found by google mention that the advance mechanism is for lucas pumps.
I will attach the equivalent diagram for a 405, and it has an advance relay too.
Interesting how the tacho sensor is referred to as a TDC sensor, maybe this could be used staticly to find top dead centre for no 1 (or 4 ).
Ronald