Re: FJ's Running on Ethanol E-85 ?
If the engine was E85 certifiable, Toyota would have done it. It takes much more than simply adjusting the computer to run on the lower octane E85 fuel. Hoses, couplings, and many other components need to be changed in order to be truly E85 compatible.
Beside that, the availability of the fuel has limited geographical availability, the decrease in MPG vs. lower cost doesn't create a positive cost benefit to the consumer as well as the reality of it truly being a "green" alternative.
But all that aside, do a search on the subject. There was a forum member who planned on doing the same but I didn't follow the final resolution to his pursuit to get his FJ to be E85 compatible. I would be much more open to converting to an efficient diesel than E85 fuel...