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keep in mind, that most obd2 tools do NOT know which mode the ECU is running in.
for any reporting of MPG or fuel used absolute.
Cold start.
warmup
hot run
accel. (fast gas foot) switches modes. !)
wot
unflood.
deceleration (in gear or out of gear)
it just dumbly assumes, stocheometric AFR. this is far from accurate.
IMHO
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