So I just bought a 2010 CTS-V A6. the car has a ported blower, 2.38 pulley, ZL1 lid, 4.5" New Era Intake, ID1050 injectors, and a Fasterproms under hood ice tank. I've installed an AEM 30-0300 wideband in the bank 2 ltft bung. The previous owner said that he got the car to a drive-able state. Fast forward a couple days, I have a day where I can data log and tune. I go to narrow band tune the MAF sensor using the LTFT bank 1 sensor, and the cars cruising around and light to medium throttle is fine, but I can't get the airflow to log over 8100hz and 48% throttle without it going rich on my AFR gauge. The car is also throwing a p0068, p0103, p0171, and p0174 codes. My guess is that 48%throttle is where the 8100hz starts. Why can't I get it to read over 8100? Is it because the other sensor is not hooked up, or is it because the codes?
I've attached logs and the current tune.