Whiney turbo when connected to boost valve

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7 May, 201313 yr

Ok my turbo kind of howls / "moooooos" at idle and almost sounds like a siren when you rev it its been like it for a few weeks now . If I disconnect the vacume from the waste gate mushroom there is no sound but as soon as I reconnect it it whines / moooos if that makes sense ? Is my turbo on the way out or have I got a faulty sensor or something ?

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