Quote:
Originally Posted by Phantobe
Well I'm unsure of others experiences when switching from e85 to 91/93, but I had very high fuel trims (18% ish) due to the high ethanol content so I know the tune doesn't adjust to the ethanol content. I had about 2 gallons of e85 left in the tank when switching.
It's more or less peace of mind. Once I kept adding 91 to my tank my fuel trims slowly crept down.
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What we're saying is it's impossible for the ECU and OFT at current to be that dynamic.. Everyone's tank composition is different so the only way you'd really obtain a true "transition tune" scenario would be akin to a limp mode map that retards timing and severely limits load/engine speed..
True peace of mind is running a flex fuel setup just no way around it
