MS3 Flex Fuel Install
the first thing you will want to do is enable flex fuel, under Fuel > flex sensor settings tab, it will look like this
note this is the settings for the chevy style sensor with temp and content hz being 50-150, look below to see the difference.
only difference in settings is, ford sensor you turn off temp input drop down box and change freq to 50-125hz
be sure to set your baseline ethanol % number to whatever you see on the display after it comes up. like seen below, this will basically set your fuel table as it is now, as the zero point for whatever ethanol content you have in, and work its addition or subtraction from that point.
Chevy Style / continental Ethanol sensor / halltech / hondata etc
Ford ethanol sensor pinout and wiring