Sound works for modded cars but not the non modded cars

[ItzJustNooby]

Ok so my issue is that the sound works for all my modded cars (AKA No hesi vehicles) but on cars like the BMW M3 E30 the cars engine sound doesn't work but every other sound does. Does any body else have this problem because I have searched far and wide and cant find a fix this is for assetto corsa the normal version I didnt read where I put it

 

[Deleted member 197115]

Wrong forum, this is ACC, not AC. No garbage mod cars here.