what are the constraints for lean burn? This transmission does not have the hf 5th gear, I am around 3k RPM at 80. I don't think the tps filter does much for a honda insight in regards to keeping it in lean burn, atleast if you're driving it right, I can manage well above 90mpg at 60 mph and over 120 in the city holding tps constant on an insight. My throttle position was almost constant on this last test, I am trying it again on this next tank.
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