How to create engine sounds

Hello all! I'm messing around with the cheetah_engine.ogg file and a, trying to make my own sound. I've made one and renamed it to cheetah_engine.ogg so the game should use it...right? Anyways, I export the file as an .ogg which is what the original is. I've renamed it to the same name the original sound was too. What am I doing wrong? Is there something in the game preventing it from using my sound file?

I've added the file so you can check it out.
Any help would be appreciated.
Thank you!

 

The sound needs to be a mono track, so if it's stereo (like most sound/video files), you will need to convert it to mono.

Also, what engine is this from? I would suggest getting a sound at higher rpm, with more throttle. you can always adjust the speed of the sound to give the right pitch for rpm ingame.

 

Thanks man! Changing it to mono worked! Now to get it to sound like I want it to.