ACEparts_com

Overboost, sorry, technically known as boost creep. The boost is going over the programmed limits. You're getting nearly 1.5 bar at 4000+ rpm at a guess. Goes like stink in the first four gears (only 1 bar) but will hesitate / blow up in the higher gears.
This ECU needs the small techart cats and some mod to the turbos (wastegate adjustment?) to perform correctly