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Old 01-06-2009, 11:27 AM   #102 (permalink)
MetroMPG
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,534

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 54.46 mpg (US)

Appliance car Mirage - '14 Mitsubishi Mirage ES (base)
90 day: 57.73 mpg (US)
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Quote:
Originally Posted by roflwaffle View Post
as long as you have LOD, RPM, and vehicle speed, you can predict fuel consumption.
Does this only apply to an engine operating in closed loop mode?

This is one of the drawbacks of the ScanGauge, in my understanding. It's relatively accurate provided you stay in closed loop, where it can make calcs based on stoich A/F ratios. But when you get into open loop fuel enrichment at higher loads, it doesn't necessarily know how much more fuel the computer is injecting.
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