Reduce the engine speed increasing ratio
WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.
The engine speed is controlled by the PCM under an accelerating condition.
NOTE:
When the accelerator pedal is pressed in a high amount, the CVT control system cancels the ECON ON control function to ensure acceleration performance.