Wheezing\sucking noise 1.6 mpi felicia

Hello everyone

I havent been here for a while but i'm hoping someone can shed some light on the above noise i have

It seems to be coming from the rear of the engine around the throttle body

BUT i can't put my finger on where exactly.

The throttle body seal seems intact and all the hoses seem in good order.

It seems as though it is a constant whisling noise and if i blip the throttle it is a defo sucking of air noise:thumbdwn:

Hope someone can help

Regards Simon