Your Sprinter doesn't even know how fast it's going.![]()
You'd think that with the amount of computers this van has in it, it would have the computing power to calculate the speed with more accuracy. Let's see if I remember all of them. Engine, transmission, instrument cluster, abs, climate control, SKREEM, even the shifter has its own computer. I am sure I am missing a couple.
But, back to the mpg subject, I cant figure out why it is so difficult to calculate the mpg accurately. Like you pointed out, the ecm, based on different sensors and conditions, injects a pretty accurate amount of fuel. Even the scangauge can't do it. You have to play with the calibration on it for a few tankfulls to make it more accurate. I know I am missing something.
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