my leak... i look at the boost gauge (iv got a fancy elec one with plasma face) on tick over its sat at -20, the gauge goes to -30, when i rev it and it goes back to tick the gauge will drop to -30 the climb back to -20, also on the "wind down" from the bay you can hear a sucking noice just as it get to tick over but then cant hear it any more, as it seem to be "sucking" i didnt want to try soapy water to find it