Brake issues

[stephan.laun]

OK like the title says I am having brake issues.... I have a 75 3/4 ton chevy wih a 454. I recently changed the master cylinder and brake booster with a remanufactured one from the parts house I work at. I bleed the brakes and have no air in lines. But my pedal is now soft as can be, and when it is pushed it does not come right back up off the floor it kinda slowly comes back up.... What could be my issues? I was thinking bad master cylinder or brake booster but dont want to sit in the cold yet again to replace this stuff again.... Sorry for the long post....

 

[dremu]

Soft pedal is air in the lines. Go bleed more -- I know, it sucks. BTDT.

As for the slow return, could be a soft spring on the pedal.

You can test the booster thusly

http://coloradok5.com/forums/showpost.php?p=2543244&postcount=7

-- A

 

[ChrisPerry]

Did you bench bleed the master cylinder? You can bleed it for days at the wheels and never get the air out of the master cylinder.