Smokes when changing gear?

DREAD

Newbie
Points
21
Location
DERBYSHIRE ENGLAND
Car
SKYLINE R33 GTS
Noticed i wos topping engine oil up quit often then i noticed it wos smoking mostley when the turbo boosts and i change gear...had took it to garage plug it in computer and comp reading were ok??sum one told me it could be a valve sticking any ideas???:(:(
 
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