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Inhowfar does it cut off air intake flow on DFCO?
I imagine that the cat will cool down quickly if you keep pumping air through without burning fuel with it, but it won't if the air is stagnant. And it will not offset the oxygen balance then.
I ask because the Insight lifts the valves in DFCO/EV mode to reduce pumping losses.
I expect it does not pump air towards the exhaust.
I set my UG instant economy readout to l/100 km, so the lower it reads the less fuel is used.
During DFCO it reads 0.00.
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2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
  lifetime FE over 0.2 Gigameter or 0.13 Megamile.
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