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gone-ot · 12-02-2013, 10:06 PM

Simply:

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)

12-02-2013, 10:06 PM	#17 (permalink)
gone-ot ...beats walking... Join Date: Jul 2009 Location: . Posts: 6,190 Thanks: 179 Thanked 1,525 Times in 1,126 Posts	Simply: 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)