Quote:
Originally Posted by Clavurion
On vacuum solenoid there is that air line connected to ambient pressure and it has an air filter. If that filter is clogged the valve will close slower after vacuum activation is stopped. So it won't affect how guide vanes are closed but slows down the opening of them. More likely this would cause over boost situation on initial boost rise face but then lack of boost on high load because exhaust back pressure is restricting flow.
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Clavurion out of curiosity and if you have a later 3.0d mines a facelifted one, when can you feel the turbo kick in and give boost at what rpm?