Tuning my 2003 2500 6.0l with a non intercooled Whipple at about 5 lbs. Tuning was going fine until I saw a horrible lean spot around 2200-2600 rpm at about half throttle. The commanded AFR is staying correct but you can see the duty cycle fall off making it lean. What did I miss? WOT is fine everytime.Attachment 20041Attachment 20042