New car sound problems!

Hello everyone, I tried to make new car sounds for my Fivem Server and I found a big problem that blocks me everytime. I did everything, I have registered sound of the car while accelerating/decelerating and I have also tried to modify the .npc file but nothing changed. When I listen the sound in the .awc file it is perfect, in game it sounds very badly, and as you can see the frequency are 48.000hz, the compression is PCM and I have converted to .wav so there should be no problem, I have also tried to make it louder but nothing changed, still sound very badly, any solution?

The only thing I haven’t touched is the .oac file which contains a lot of numbers and I totally don’t know what or If I have to change them.