2006 GTO 6.0L manual.

I can't get the throttle body to open more than the preset 22%, no matter what. Adding more airflow into the startup airflow table does nothing. Adding LOTS more airflow does nothing.

It seems like the throttle body has a pre-determined opening amount, and that's it. And that amount seems non-adjustable.

This car is a cammed up engine that seems to want more airflow to start up. Hot starts are fine, but cold starts it just doesn't let enough air in.

When datalogging, the throttle opens this preset 22% key on-engine off, but as soon as you hit the starter, it closes the throttle to the amount determined by the minimum area scalar. If that minimum airflow scalar is left to the stock 5 sq mm, the throttle body closes to 1%. If I increase it to around 75-85, it opens 8 or 9%. That's enough to run the car at a nice minimum airflow amount, but not enough to start the car up cold.