Yes, posted that it could be a boost leak popping a hose or the choppy sound could be the exhaust side leaking, maybe from the EGR hoses.
Is it possible that the actuator is causing the problem? Maybe. Use a vacuum tester and see if it's moving at the correct place. FYI, you can swap the N75 and EGR as a test instead of just replacing the N75 to see if it does anything.
Is it possible that the actuator is causing the problem? Maybe. Use a vacuum tester and see if it's moving at the correct place. FYI, you can swap the N75 and EGR as a test instead of just replacing the N75 to see if it does anything.