When tuning with a different wastegate actuator or boost control solenoid it is best to tune the vehicle in open loop first to get your initial open loop duty cycle correct. Once this is correct you would enable closed loop again There are 4 modes the boost control works in in the FG. Idle/Cruising mode (0% duty cycle) Overboost (0% duty cyle) Underboost (100% duty cycle) Closed Loop (Variable %) In closed loop the wastegate duty cycle is determined via the f