Just to revive this issue! All the stations here are pumping gas with 10% ethanol now. Does this affect our tunes? I have heard that ethanol has a higher octane rating than pure gas. Should the timing be advanced or rewritten into the code?
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2005 F150 XLT SuperCab 5.4L V8 4x4, 3.73 LS Rear end, Auto Spring 2" Leveling Kit, Gryphon tuner custom 87 Performance tune, AEM Panel Air filter with modified stock intake, 14" Magnaflow muffler
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