Strange noise when lifting off???

[Mikee]

Noticed a strange noise yesterday on my way to work. When I lifted off the accelerator at low revs and low speed after the initial bov sound (forge spacer) there was a really faint sound. The only way I can describe it is that it sounded like someone whispering "woo" very quietly (worst description ever)

Any one any ideas?

Just so happened my warranty ran out last week!!

Ps this is a Leon fr tfsi

[nezquick]

like this?

if so it just flutter, maybe have a play with your bov to get the settings right? maybe you have too much being vented? (im no expert)

the "woo" description is a bit difficult to pinpoint 

[nezquick]

my mistake, thought you had a forge bov in that case i thought it was quite normal to have a little flutter when using the spacer but i might be wrong.

[Matto]

Does it only do it between 1-2k rpm? Mine does a weird noise similar to the one your describe.

[Hogster]

I have just noticed this noise myself, pretty sure it's only just started. Have had a stage two map on for the last 5k and it seems to be running fine 

[bulak]

Mine makes this noise as well, happened after I put bluefin map took the map off and it's still doing it, car running normal had dyno done just to see any difference from a previous dyno no change in results. Confused myself