One of the results running E85 is that it strips / cleans your fuel system, this is usually good but can be a problem on your first initial use because of how it strips your fuel tank and can block injectors downstream (you will probably still show fuel pressure but get little flow to your cylinders). Take out your injectors and get them cleaned. Could also be a good idea to replace all your filters (especially if you have changed to non OEM units) and run a fuel / injector cleaner through a tank of fuel too. I don't think a fuel based miss-fire would be enough to show a majorly leaner wide-band reading either.
Honest bet this will fix your problem, however few other things to try
* leakdown test maybe you valves are passing compression through the seat ?
* try stick to copper plugs heat 7ish - always had miss-fire problems in the past with boosted setups and iridiums.
* Im not too familiar with the Kpro - but can you bring up in your datalog the firing signal for each individual coil pack ? possibly determine if this miss-fire is only happening in one specific cylinder or if its random over them all?
Good luck
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