My guess about the DAM is that it is not set to default to 1 (probably for Cobb's safety so they don't get sued).
The small knocks you are getting keep resetting the counter so it never gets incremented up to 1.
As for A/F Learning, there are only 3 ranges it sets values for one super low (~5g/s) mid range (5-50 g/s) and high (>50). My guess is that your mid-range is learning 1.56 during closed loop fueling, then when you go WOT it takes a while to get to the highest airflow values, and therefore the zero on your learned chart
The small knocks you are getting keep resetting the counter so it never gets incremented up to 1.
As for A/F Learning, there are only 3 ranges it sets values for one super low (~5g/s) mid range (5-50 g/s) and high (>50). My guess is that your mid-range is learning 1.56 during closed loop fueling, then when you go WOT it takes a while to get to the highest airflow values, and therefore the zero on your learned chart
