Hydraulic pump sound ('90 IMP)

[Tim Clevenger <tjclevenger@xxxxxxxxx>]

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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