Car info:

Golf estate 2009 (58)
2.0 140bhp diesel engine
Engine code (CBD)

Symptoms

Low revs up to 2k care drives fine
over 2k black smoke and occasionally stutters
no power over 2k rpm
No fault codes using my delphi dsc150
my vagcom 409 does not connect
Turbo whistle only slightly but every turbo diesel i have owned does it

Things i have done

Checked the actuator moves freely by moving it with vacuum tank not being mounted to the turbo (which it does)
put a vacuum pump on the actuator and tested (it does move but only half inch possible an inch)
disconnected dpf/cat and spray mr muscle in back end of the turbo
shaft has a little play but spins smoothly and freely
disconnets maf (no difference)
changed air filter

has anyone got any ideas before i replace the turbo