Originally Posted by costina

Is the puff black or blue?

if black its overfuelling if blue oil

Check turbo outlet to cooler is there oil if so turbo seals have gone. if you have replaced turbo have you cleaned out intercooler? oil residue in cooler when hot goes into intake and burns

Also breather block under intake is that clean? excess pressure will cause piston blow by..

What chip and injectors are you using? ab chips overfuel a lot

Hope you get it sorted m8