kettle

I get a intermittant whistle which I think is comming from my dashboard. The odd thing is it goes away when I press/tap the brake pedal.:think: Ta

I am having a problem with my 1.8T. 80,000 miles I have had a REVO remap but i think this problem may have started before, but not to this extent. Car drives well and seems to be holding boost........but only when the boost level reaches maximum there is an almighty loud whistle. I mean this...