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1992 Brake issues

Yellow92

New member
Joined
Aug 6, 2017
Messages
2
Location
MD
Corvette
1992 Yellow
I know there are a thousand brake posts, but I have not seen one with this symptom.
Just bought this 92, with 26K on it. Drove it home, was 2 hours away, and on the way
home pedal seemed to sink further and further towards floor. Had to press very hard to get
brakes to work. Long story short, turned rotors, new pads, checked ABS unit for air as FSM states.
Flow out of rear calipers seemed slow, also pedal would not go to floor when bleeding.
Front calipers bled normally, all clear fluid out of all calipers.
Hear swooshing sound when pushing down pedal, but I hear no leaking when depressed.
As it stands now, car stops straight, but it seems I need to press to hard on the pedal to make it stop.
Also, is it normal to have a hissing sound at the back of the engine when car is shutoff, doesn't seem to
happen all the time, but have heard it a couple times. The pedal does not always go down when car is turned on, indicating
intermittent booster issue. Thanks for reading my loooonnngg description. :ugh
 

Yellow92

New member
Joined
Aug 6, 2017
Messages
2
Location
MD
Corvette
1992 Yellow
Thanks, I think someone may have did a rig-job on the hose going from the bottom of
Master Cylinder to the ABS pump, not sure if that may be an issue also.
 

Hib Halverson

Technical Writer for Internet & Print Media
Joined
Jan 10, 2001
Messages
13,453
Location
CenCoast CA
Corvette
71 04 12 19
My guess is you have a problem with the brake booster or the hose which runs between it and the intake manifold. Either there is a leaks somewhere in the system or the booster if failing.

As for the ABS prime pipe...I'm not sure what a "rig job" means, but the instructions for bleeding and or servicing that are in the Service Manual.
 

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