I've disabled LTFT's and LTIT's. I'm fighting this car trying to add airflow when it's moving. I've added both cracker and rolling idle air and when the car's rolling, it shows the cracker as it should, but the throttle position doesn't ever change as a result. I've gone as far as adding 2lbs prove it's not working. Also, I've heard about the E67 and E38 having an issue where the fuel trims stop working momentarily due to misfires in the background, but this is not the same kind of issue. In this case, the fuel trims are freezing at whatever value they're at and they stop moving at all, negative or positive. I haven't discovered any correlation between anything causing it. The freezing trims appears to be random.
This is in a 2001 C5 with a 3-bar OS