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Old 10-24-2008, 11:11 PM   #29 (permalink)
jomelmaldonado
Puerto Rican Hypermiler
 
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Join Date: Oct 2008
Location: Arecibo, Puerto Rico
Posts: 34

Toyota Echo - '05 Toyota Echo
90 day: 41.71 mpg (US)
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Well, at least the cruise I have, an Audiovox Universal CCS-100 can handle a wide range of frequencies since it's supposed to support different voltage levels, Pulse Per Miles and Wave Patterns because different cars have different ways to report the speed. The Auidiovox CCS-100 has an option to choose from 2000, 4000,5000 and 8000 PPM's If you see the Excel file, there is a table I made that converts from MPH to Hz based on the 4 options of PPM's. And in the 8000 PPM setting, the output frequency in Hz from the MAP Sensor falls in between the 8000 PPM setting, actually from about 36-72 MPH.

Remember that with this modification, it will think it's monitoring MPH from the VSS, but actually it will be monitoring Vacuum from the Ford's MAP Sensor. It will only checkl, like always, for any increase or decrease in frequency on that gray wire and it will compensate adjusting the throttle.
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