How do i make my custom engine sounds work?

Hello everyone and today i'm currently working on a Engine sound mod i have replaced all the files i need but when i go in-game no sound is make from the vehicle other the tires have their sound if anyone could please help that would be great

at 1:15 its lagging for some reason idk why

As you can see om the video my custom engine sound's i made dosen't appear but, when i exit the old vehicle it puts the stock engine sound on it with some kind of twist to it. But when i was driving the Police2 the engine was completly normal, nothing was wrong with it.

If anyone wants to help me or give me a guide feel free to reply or send me a private message. :)

Kind Regards James Rasmussen

Edited December 21, 20169 yr by jamesRasmussen