[s-cars] Pulsating brake pedal

[Fred Munro]

The brake light is on because the hydraulic pressure in the brake boost
system is low. The pulsation you feel in the pedal are the pressure pulses
from the hydraulic pump. The most likely problem is a dead "bomb" (pressure
accumulator), but you could also have a bad pump, a restriction in the
hydraulic system, or be low on hydraulic fluid. Don't drive the car in this
condition - you cannot panic stop a 4000 lb. UrS without brake boost assist.

HTH

Fred Munro
'94 S4

-----Original Message-----
From: s-car-list-admin at audifans.com
[mailto:s-car-list-admin at audifans.com]On Behalf Of TM
Sent: April 11, 2003 1:14 AM
To: s-car-list at audifans.com
Subject: [s-cars] Pulsating brake pedal


This is a multi-part message in MIME format.
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Hello,

I have a 1994 S4.  Today I started the car and the brake warning light did
not turn off (the light usually turns off when the handbrake is released).
When I drove it, the brake pedal pulsated every time I pressed it.  Brake
fluid level is fine (system was recently flushed and new brake lines
installed).

Any thoughts?

Thank you.
--

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