With a E85 blow through, usually is not going to be happy at idle with a AFR any leaner then 13.5 without cruising on and off throttle issues. I'm not saying not to shoot for it. Just if that is the case don't fight it buy having it set in your mind that it has to be 14 or above to be right. Mine is at 13.2 at idle because that's what it wants. Any more it just won't run right off idle and cruise.
Good luck I hope you don't run into the same thing I did.
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