My boost goes higher too when I have the actuator enabled.
Enabled:32-35psi
Disable: 23-26psi
The actuator could be sticking like @AK Bob said, or veins could be sticking(is that possible?) or the actuator could be on its last leg.
Can take turbo off, remove actuator and clean.
Maybe go a step further disassemble the turbo case and clean the veins too?
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