might be another stupid question of mine

but how do you know when the standard recirc is foofed?
through gear changes and when backing of you can hear the valve chatter as its dumping the air back in, i do have cone filter so this would sort of amplifiy(sp) the sound a bit.
the reason for asking is that a lad i know said its making that noise becouse its knackerd, diaphram has split

is this true?
i will be changing it anyhow when i have a remap

cheers