im not sure how well this will work if at all,
the standard o2 sensors only read from about 14.2-15.2 and the whole time the standard computer bounces between these two figures in closed loop for fuel economy, i cant see any benifit from making it richer while at light load?
and wont it still just adjust within this range?

what im saying is can you explain a bit better what it will actually do? and how it will adjust to make the car richer or leaner, as the computer automatically adjusts to small differences, or is it to be basically just a guage.
possibly your car might have a different ecu with different fuel adjustments to myne and hence i shouldnt have posted anything?