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Date: 11 Jul 2001 11:27:15 -0700
From: yaofengchennopsam.com (Yaofeng Chen)
Subject: Re: Soft brake on 1985 manual Saab 900


John Hepworth <hepworksnopsaml.net> wrote in message news:<3B4C6323.9C30C83Bnopsaml.net>... > I have a 1985 5 speed manual (non turbo) Saab 900. > > Recently the brakes have been intermittently soft (i.e when I press > there is less resistance than normal and sometimes when stopped the > pedal will almost go to the floor). Usually if I come off the brake and > brake again the pressure comes back. Once the brake fluid light flashed > on but only briefly. This has only been happening once in a while. > > Service wise the rear brake lines were recently replaced in another > city. My mechanic (not a specialist) could not find anything wrong with > the brakes. He said it might be the master cylinder but he was > describing the brakes going soft after long periods of not braking (i.e > highway driving) while I've been noticing the problem more often in city > driving. > > Has anyone had any experience with this? > > Thanks > > John Hepworth My '89 900S has been doing something similar for the past three years. During summer in stop and go city traffic, the brake pedal would sometimes sink. If I pump it, the resistance and brake is there. It is otherwise normal in highway and none stop-and-go driving. My own diagnostic is the master cylinder is slowly going, but is it? Bought the master cylinder three years ago. Too lazy to replace it. It is sitting in the garage collecting dust.

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