Date: Tue, 7 Aug 2001 22:09:31 +0100 From: "Woolfie" <john_woolfnopsamamhotmail.com> Subject: Re: vacuum brakes hiss, idle is high?
If you are sure it's not a leak in the hose or connector then I'm afraid the leak is probably inside the brake servo - you can't repair it - you're going to need to replace the servo. JW "Clark Magnuson" <cmagnusonnopsam.com> wrote in message news:3B6F0945.ECF2714Anopsam.com... > I have an 89 Saab 900 that is idling at 3000 rpm until warm, and then > when warm, idles too low. > > I replaced the distributor and rotor. That made it quit missfiring. > > When I turn the engine off, for 10 seconds a hiss comes out of the > brakes master cylinder area. > The connection between the vacuum hose from the intake manifold and the > vacuum assist brakes diaphragm housing is where the hissing is coming > from. > I covered the connection in duck tape, and the idle is still high and > the brakes still hiss for 10 seconds after engine shut down. > TIA Clark