GTV Hissing and air noise
Have just purchased a 1997 GTV 2.0 TS. There is a constant hissing noise coming from what sounds like underneath the dash although I can't actually narrow that down anymore than that currently.
The hissing occurs from the moment the car is switched on, sometimes the first couple of brake presses produces a squeak, when the brakes are depressed about 50%-75% the hissing disappears, 100% depression brings the hissing back. The hiss appears to disappear once you get to about 30mph or so, although it may be cancelled out slightly by road noise etc.
The brakes seem pretty responsive, front pads and discs were changed 6 months ago, rears about 18 months ago. There was a slight rubbing noise from the front pads initially but this appears to have eased off as Iíve done about 500 miles in the last week since purchasing it.
Any ideas what the problem could be?