Today I figured out (with Ray's help) why the power has been pulsing for the past two weeks. Actuator is dying. What actuator and where to buy. Should I go with a new VGT altogether? Need to figure this out fast, because the Cat's gotta keep getting to the job sites!! I need a long term fix, and I think I want to stay with VGT because of exhaust brake. Frankly I don't even know where to start considering the internet has so many 6.7 turbo and parts offerings. TIA