tasdrouille -
Quote:
Originally Posted by tasdrouille
The fuel mass is computed from the air mass, of which iat is a correction factor. In closed loop the fuel mass is calculated from the input of various sensors, and is corrected from the output of the ho2s. Ever heard of fuel trim?
Where did you get that iat is part of the formula the sg uses to compute fuel usage? I never read that anywhere.
And even if you don't touch the ho2s and do the iats resistor mod, you still retain the timing advantage given by the mod.
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Last summer I replaced the IAT sensor with different resistors. I got progressively better MPG on the SG, but I didn't believe it. Others have had similar results with long term resistor swaps that 1) didn't effect driveability and 2) didn't effect their observed fuel usage.
CarloSW2