ECU has just one large plug, and seemed to never have been disconnected or even had rubber boot removed. Cleaned up (with interdental brush) but still exactly the same, except Rev counter (Tacho) doesn't work now. Think a fuse popped as I disconnected ECU plug.
Cuts out, I pull over disconnect coil and plug back in and it starts and runs for a while (5 mins or 1 hour sometimes).
Any ideas ??