If all that were true, you should be able to switch your device OFF and ON and see your WBO2 go from rich to lean and back again at the flip of a switch while the engine is under load, not just idling. It takes 10-20 times the injector DC to cruise down the road vs idling so in order to maintain the same -40% fuel trim you gas generator would need to increase its output proportionally.
You're making a very big claim here and I'm skeptical as is everyone else. You'll need to provide much better data in order to convince anyone around here. Just showing that your device is running -40% fuel trim at idle while drawing 30a isn't enough.
cheers
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