Hi Steve:

___The Insight’s NOx purge event is a bit longer in duration (~ 10 seconds every 3 or so minutes) and you can see the sinusoidal damped fuel injection programming happen in real time over the first 1 to 1.5 seconds by watching the game gauge through its initiation. I usually make 2 to 3 very small accelerator adjustments in the second or so after it hits to dampen out the normal transient to maximize fuel economy. The small acceleration you described is a text book example of a Lean-Burn capable Honda ICE entering the NOx purge event but it sounds like the Insight’s event holds for a longer period of time vs. your HCH unfortunately

___Good Luck

___Wayne R. Gerdes
___Hunt Club Farms Landscaping Ltd.
___Waynegerdes@earthlink.net