RB 182
..... I've just been checking my tyre pressures and heard a hissing noise from the front N/S wheel. At first I thought it was a punctured tyre but that was OK. I remember taking a small black pipe off the accoustic valve that lead to the engine just near to the throttle body and am thinking this could be the source of the hissing noise. Do I need to block this up or just leave it as is?