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Old 05-11-2012, 12:15 AM   #175 (permalink)
mjspiess
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Join Date: Nov 2009
Location: Lansing, MI 48917
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The Blue Bomber - '95 Geo Metro
90 day: 52.09 mpg (US)
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You got it Cobb. The Ford MAP sensor is able to produce a square frequency just like the VSS does, so they "look" the same to the cruise control, but the MAP is measuring vacuum/engine load which translates to MPG vs VSS measuring speed not caring at all about MPG.
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