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Using the resistors will eliminate the inconsistencies coming from the O2 sensors to the ECU. The O2 sensor input to ECU will be the same under all conditions. This would be ideal with a power commander installed. But exactly how it will help without power Commander is yet to be seen. I can imagine that cold starts will be improved and a more consistent idle I hope . The other benefits can be better fuel economy but I don't know. I will report back if I try this . Of interest to me is cold starts , consistent idle , no stalling at stops , low speed plug check , high speed plug check and finally fuel economy at a steady 70 mph which I will compare to my benchmark.