Quote: Originally Posted by
SpeedEuphoria 
the main hurdle would be ONLY using E85, not switching back and forth.
The A/F doesnt matter, its an O2 sensor it reads Oxygen the PCM wants 14.7=1 Lambda, if you change to E85 and leave the computer thinking its gasoline it will still try to get 14.7 or Lambda 1(which will really be A/f of 9.2 or whatever). A/F is just a number like HP, to get it you use a multiplier and the real data which is Lambda or Torque, its just that people use different multi's to get different A/F's and normally dont with HP.
A narrowband 02 sensor cannot read this range, sometimes when a a/f ratio is WAY outside the range of a sensor it has the nasty tendency to peg Pig RICH even when it's actually a lean condition. I don't need to tell you what this would do to your a/f ratio.
