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Originally Posted by soutthpaw
...probably a longer injector "on" time to dump more fuel in the engine ....
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That's how Brazil implemented wide scale ethanol use in cars originally designed for gasoline. It's a wiring harness that goes between the fuel injectors and the (gasoline) PCM that just keep the injectors on for 20% longer.
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...As far as i am aware the engine cannot tell the pecentage of E85 vs gasoline in the fuel tank to make changes...
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FFV Taurus use a sensor in the fuel line that measures the optical property difference between gasoline and ethanol and is able to tell the PCM about that percentage. PCM can then manage fuel and timing for any mix between 100% gaoline and 100% E85. I'd assume that FFV F150s likely use the same scheme, but I have no first hand experience.
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2007 F150 XL, 4.6, Regular Cab, Gryphon Installed 2/2009
"voiding warranties since 1979"
