I have found that the ECU will actually adjust current, not voltage, in my tests, I found I always had the same voltage with no load (no plug)regardless of the ECU plug setting, the actual final voltage is defined by the load. Why don't just fix the root of the problem? Check to verify if you see any kind of obstructions on the plug hole, possible contact with the combustion chamber, etc. Or have the turbine checked, I still believe the problem is not the ECU, IMHO I don't see you getting anywhere here...