Hi I'm experiencing a strange problem since some days.. after a long highway drive 800km
I'm having a lot of noise inside when driving at 70-90 km/H the rpm are ok compared to what i was used to , i also need to give more throttle to go forward than usually to reach the speed i want
I've checked engine oil level , and putted new gasoil ( I've driven on the highway until reserve and take some gasoil just to came home
I've checked air intake ,there is a leak form turbo resonator , but i don't think it come from this ...
The noise level is very high now meaning , you can badly hear our passenger
I don't understand , because usually it's a very quiet car...
What could be the problem ?