Sorry I have not responded sooner, have been off the boat without internet for a bit.On the Volvo D3 – 110 you can see the round vacuum actuator attached to a rod that leads up to an eccentric or cam on the turbo.Although Volvo calls this a variable geometry actuator, fancy terminology for a way to change the angle of the blades to change the amount of boost pressure as engine load changes.Mine was sticking and giving an engine error code.Virtually every company I talked with said the turbo had to be rebuilt.I found a very helpful Volvo dealership that sent me the attached service bulletin.I sprayed the actuator and eccentric then worked both back and forth with a screwdriver to free it up, my problem was solved.This may be the issue you are having.