just before where the trubo connects to the intercooler hose there is a small boost hose that attaches to a T piece.
the restrictor is in the hose between turbo and t-piece. this only has a 1mm hole in it so canget blocked.
the other side of the t-piece goes to the actuator
the bottom of the T piece goes over to the wing where it connects to the boost control solenoid.
clean these pipesout with carb/brake cleaner
while at it spray a bit through the boost control solenoid too.
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