Hello, I have an Alfa 166 Bj: 2005 , 2,4 jtd 20V . When starting it has no power and when it comes and the turbo jumps in , then comes out a black smoke cloud . Have already cleaned the throttle flap , the AGR cleaned and just can not find the error . Also the V-belt screeches always when starting up , new V-belts , new tensioner and the large disk I have also changed . All mentioned problems are still there . Can someone say something ? Thank you very much . Gr uĆ: Holger