Adjusting the resistance leaves one with the same problem as before, the ECU will respond with more fuel across the entire rpm range. A good ECU map will try to maintain the mixture at a steady state but, in reality, many maps go from lean to rich and back to lean. This means that your 'fooler' might take care of a lean condition on parts of the map but a super rich condition elsewhere. The only way to know what's going on is to put the machine on the dyno. I have seen some very talented tuners who were able to build a map to flatten the mix but this is not something the average garage tuner can accomplish. If the Delphi ECU was used in large numbers of motorcycles we might see tuners stepping up to create a better map but that's not the case right now.
Personally, I do not have a problem with the fueling on my RX4. I'm keeping it stock, along with the intake and exhaust.
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