try to re flash. might have to get doug to resend tune. mine did that and found out that the tune had a degraded file. after re-tune runs like a scalded dog. Hope this helps.
Well I pulled the plugs they looked like crap heavy brown buildup...I dont run additives!! Cleaned them all and the butt dyno says it runs a lot better.
if it still has the "miss", my dyno showed that jog at about 5200rpm and it felt like a miss like you say, my tuner said that it was the spacer plates between the intake and the heads that have a butterfly valve in them to increase tourque and fuel mileage. I can feel them open even when i am wot at that rpm. We can take them out and just put in spacer plates and it will make it a smooth pull