see can you move the actuator arm goin to the wastegate by hand could be tight from left idle doubt it but try it anyway.
Rite been out at the car for the evenin, i blocked the airfilter pipe and put 2bar of pressure in to the system got a few minor blows tightened clips and that sorted them out no more leaks then started the car and no change at all?????
check your waste gate, it shouldnt be open on idle.
i like stuff
check the vacume pipe thats goin to the actuator from the boost solinoid on the right turret!!