VGT TURBO ACTUATOR INSTALL FAILS

[BlueTurbo]

Just replaced the engine brake parts on top of the engine and still the same issues with the engine brake. It works just around 5-7 psi...mechanics don't understand what the problem is. They said there's nothing else they can do.

Before I got the engine brake not holding above 7-8 psi i had a check engine light with VGT turbo actuator not communicating with ECM and when the check engine light was ON the engine brake work only work around 6-7-8 psi. After it was off it worked fine. Now I have replaced the VGT ACTUATOR and engine brake parts in the engine and still doesn't work.

Anything else I can do??

Thanks.