i have a 2012 ss camaro with a magnuson kit in the shop. we put long tube headers on it and put it on the dyno. It had the tune from magnuson in it...first pull its rich at 10.5 then halfway through the run goes to 13.5~. PE table is 1.24 to 1.25, MAP enable is 15kpa, rpm is 300, 0 delay and TPS enable is 30%. i got the AFRs tuned in and it fuels within a couple percent at 11.7 then the commanded AFR goes to 14.44 around 5300rpm. Error percent stayed close even when it leaned out. Out of the 7 pulls only 1 commanded 11.7 through the whole run. Changed every parameter i could find that had the ivt, ect , iat, or rpm that i was seeing when the commanded afr changed.