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Old 12-02-2013, 11:19 PM   #18 (permalink)
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Originally Posted by Old Tele man View Post

a) assume A/F-ratio of 14.7:1 (closed-loop ECM);
b) measure Air flow from MAF or MAP sensor;
c) backsolve for GALS/time;
d) and divide: MPG = (MILES/time)/(GALS/time)
That should work as long at the A/F ratio is controlled tightly and the air flow is measured precisely. So why does everyone have so much trouble calibratiing? Why did the SG folks tell me it was a proprietary algorithm?
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