At the end of May, driving around 140 km / h on the express train, my turbocharger died. With my broken car, I got home about 50 km. The turbocharger went to regeneration and after putting it on, everything returned to normal. However, the next time I went to the highway, with the sudden addition of gas, there was a decrease in power that was smaller than with the failure of the turbocharger, however, preventing normal driving. After turning off and on, the car started to work normally, but the situation repeats itself when the gas is suddenly added. I went to the mechanic on the computer, but he said that the computer did not show any error, only while driving with a sudden addition of gas, the turbine was reloading, but the prescription did not indicate it. A friend of mine advised to clean the EGR and the manifold. I did, the parts were quite heavily contaminated with oil. It didn't help either, come on I noticed minimal improvement. I am asking for advice on what may cause this power drop.