The turbo environment is about.

Friends are completely black around as long as they appear in the photo. The vehicle fluctuates at a constant speed. I couldn't help if he missed the turbo. Is this Normal or need maintenance? No malfunction lamp lights, three thousand cycles pass.

Probably my teacher regarding loose bolts and old gaskets. this few will cause loss of performance.

I hope so. I will look at it now. Otherwise, there will be a lot of expenses.