I don't have a handbook which is part of the problem - I'm working pretty blind, and it also sounds as though the whole set up between distributor/coil/plugs etc is non-standard.As Spiderserie4 says you have a "0 227 100 111" ign amp, which is supposed to go with a distributor with built in advance curve. The " 0 227 100 100" is basically just a transistor switch, with the dwell timing done by the ECU. I guess your distributor must have advance weights in it, but I've never seen a non-points distributor that isn't fixed advanced, so thats a new one. What does the wiring diagram in your handbook say about it ?
What would be great is to have some idea of what to try to fix the problem - am I looking at a new distributor or can anyone see a way of making progress with what's already there?
At weekend I'll look over the connections to the Bosch Module as SS4 suggested, but beyond that I'm pretty stumped!