I do not know if the coil is triggered by the ECU. I think that is a very early ECU as there are no diagnostic ports at all. The good folk at BHM have advised me to look at rotor arm first then perhaps the flywheel sensor and then the distributer cap. After that I suppose the trigger. I will have to start with cheapest parts and try and do some diagnostics on the way. Thanks Rob for input. PS immobiliser is a bit sophisticated for my M16 - unless I am missing something.
