blue smoke

Hi, I've recently EGR deleted, downpiped and stage 1 tuned my 105 BLS 1.9 TDI However now i have a probelm that accures every 300 km. It will begin to misfire and produce tons of blue smoke for about 10-15km. And suddenly returns to normal with no misfiring. Anyone know my problem? My own guess...

Hi guys I posted this earlier but think it was in the wrong place. 2008 leon fr tdi 2.0 170bhp Using a lot of oil (1 litre every 300 miles average) blue smoke pumping out of the back of it lazy start up, lumpy idle and no power now at all. Started about 3 months ago blue smoke coming out of...