Replaced actuators.....now this...Need imput.

[Wiseman]

Before you jump to HX60 , I urge you to inspect your turbo . How it travels . Then visual on cage and ring . Although the actuator have a very strong spring , something is preventing the cage from returning back all the way . Then check the air controller below compressor . It will not cost you anything. But at least you gonna know where's the problem.
I think 15 at full engine brake is on the low side . Almost like cm570 . That leads me to think the cage doesn't travel what the controller said.