[s-cars] Hard brake pedal?

[Peter Schulz]

Eric:
Test your brake servo.

-Peter

At 10:23 PM 3/3/2009 -0600, Eric Rechlin wrote:
>Hello everybody,
>
>I have a 1995.5 S6 Avant with over 170,000 miles.  I have the Big Red 993TT
>brakes (installed about 1.5 years ago).
>
>Something that I have noticed over the last few (maybe 6) months (I'm not
>sure when it started) is that the brake pedal is always hard when the car is
>off.  Also, if I hit the pedal very forcefully while at highway speeds, the
>pedal is initially hard until maybe 1/3 of a second later, when it feels
>normal.  Under lighter braking it always feels normal.
>
>Normally I would assume this is a case of the accumulator/bomb needing
>replacement.  In my other car, a 1991 100 quattro, I had similar symptoms
>about 6-7 years ago, except there the red brake warning light stayed on for
>a while when starting up and came on in heavy braking, and I fixed it by
>replacing the bomb.  But in this case, the red brake warning light does not
>come on abnormally (only when the parking brake is on and for a couple
>seconds when starting the engine).
>
>Might it still be the bomb?  Or could this be something bigger and/or more
>expensive?  The bomb was last replaced precisely 4 years ago, to the day
>(~36,000 miles ago), by the previous owner, and at the same time the power
>steering pump was also replaced.
>
>Thanks,
>
>Eric Rechlin
>Houston, TX
>
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-Peter Schulz
Chelmsford Ma, USA
http://www.naaclub.org/

1995.5 S6 Avant Emerald/Ecru
1995.5 S6 Avant Silver/Platinum
1991 90 20v Q Red
1991 CQ silver  (eS2 recipient)