|
This sounds like air to me, though can't be 100% sure there isn't a mechanical component. Audio is short and not the best.
I would try to isolate the location a bit better. Maybe use a carpet scrap or small throw rug to wrap around the intake parts. Also maybe drape over left and right side of manifold. Obviously avoid the moving parts, but something like carpet should muffle the sound enough to help you get a better idea of location.
My longshot guess on this is that the diaphragm part of the sound tube is the problem here. If you are not married to keeping the sound tube, there are many threads here on deleting it, which is pretty easy.
|