hi, im faily new to the mk4 scene, got my self a mk4 gt tdi 115 a month or 2 ago

but now i have no boost and no fault codes and im kind of stuck with what it could be? im thinking possibly n75?
a few weeks ago i had a vnt clean and wd40'd the actuactor as it had been sat for a year ish and had an overboost problem and this sorted that
any help or advise would be great! thanks
