84 GN possible Hydro Boost Problem?!?

[coolguywalt]

Just finished putting on new rotors, pads, wheel bearings, drums, shoes, wheel cylinders and bled the system. While sitting at the stop sign, the pedal slowly sinks to the floor. Once there, the brake light comes on. Now, when I am at speed and am slowing down, the brake pedal slowly goes down to the floor again. Once it is all the way down, the car will still creep foward. WHat is the deal? Poss. master cylinder problem or a Hydro boost problem?

 

[cool 84]

Sounds more like a master cylinder. When the hydroboost goes it's usually the opposite problem, a hard pedal. BTW, I love the hydroboost brakes, much better brke feel than vacuum or powermaster.

 

[deadlois]

I got the same exact problem, so you say it is the master cylinder?

 

[49-blues]

I have a good hydroboost unit w/ power steering box-$85. shipped.

 

[zeljko]

can t be fixed

Is there anything that can be done with out pulling out the whole Hydro Boost? I have the same problem a real hard pedel

 

[Instro84]

i had the same problem with mine slowly lost all brakes after new master cylinder. turned out to be the proportioning valve.

 

[zeljko]

did that eliminate the hard pedal, by replacing the proportioning valve

 

[Instro84]

my pedal wasnt hard, went to floor had no brakes at all.