Hydraulic pump sound ('90 IMP)

["Mark Swingle" <mark.swingle@xxxxxxxxxxx>]

It does have an ABS pump and that's probably what you hear.  It's necessary
because the ABS operates at higher pressure than the "normal" brakes.

However, it's also a sign the pump is having trouble keeping pressure.  The
pump is covered by a lifetime warranty, if its the Bendix one, but they
probably won't consider it a problem until the ABS and brake warning lights
are on.

Mark
90 Imperial

-----Original Message-----
From: mailing-list-owner@xxxxxxxxxxxxxxxx
[mailto:mailing-list-owner@xxxxxxxxxxxxxxxx]On Behalf Of Tim Clevenger
Sent: Friday, June 04, 2004 11:38 AM
To: mailing-list@xxxxxxxxxxxxxxxx
Subject: IML: Hydraulic pump sound ('90 IMP)


Hi all,

When I'm driving my '90, about every third time I step
on the brake, I get a sound like a hydraulic motor
running for a few seconds.  Is that some kind of brake
booster, or is my ABS pump running when it shouldn't?
I would expect that this car would have vacuum brakes
like most others, so it wouldn't need a motor running.


Thanks.

Tim




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