I have a 08 a4 2.0t it has 158k miles on it, I literally haven’t had any problems in all my 40k miles of ownership. I maintain it regularly, change my oil every 3k miles. I was doing a couple pulls with my friend when my car begin to blow smoke and lose boost. I know that this is the turbo, it seemed to only do it when I get in the high rpm range. So I continued to do pulls and limit myself about 4500rpm. I let the car slowly decelerate on its own so I can hear some pops (the car is straight piped) then put it in neutral and did a few revs to about 2500rpm. I begin to accelerate (like a normal human being, regularly) and the car felt “boggy”. Literally the best way I can explain it and it sounds like a f*ckn diesel truck!!!! The idle is also extremely rough, there are no warning lights. It shakes extra hard when I turn the ac on. It doesn’t accelerate any differently other than when you first get on the gas. If I want to accelerate hard, it does it the same way it did before, it’s just now it vibrates like crazy. Do anyone have any knowledge on what can be wrong?