Turbo noise (Whistle) after we carried out intake clean. Have used this many times with good results. We did this vehicle 20 000 km ago and the customer was so happy with the increase in performance. However, after carrying out the same process, the turbo has a noticeable whistle noise.

The engine has a turbo whistle that increases with engine RPM. The noise is always there since carrying a carbon clean on the intake system. The noise appeared a few weeks ago and has remained the same. The vehicle does not lack power.