I've changed everything on this except the proportioning valve and back brakes
SOURCE: Brakes no longer work in 1989 Chevy half ton pickup 2 wheel drive 350cubic inch
change dump valve under master cylinder
SOURCE: brakes
Flexible brake lines are probably balooning out causing pressure not to build up, replace flexible to the calipers.
SOURCE: i have 1996 e 250 single rear wheels, my brake
I would POWER BLEED the brake system. Hope this helps
SOURCE: Spongy brakes
So long as the brake booster is working, test it by turning on the engine, press the brake pedal all the way down, then shut off engine keeping your foot on the brake pedal, if the pedal comes up slightly pushing against your foot then the booster IS working.
Did you BLEED the brakes??????
I just went to Brake Masters this morning and had them replace the Master Cylinder since I was experiencing the pedal very spongy and going to the floor. When they replaced the Master Cylinder and they gave me back the car, the brakes were still spongy and going to the floor. I addressed this to them and they took another look at it, but when I took it for a second time, the brakes were extremely spongy. It was almost like they gave me back my car in worst condition to when I brought it in. Can you help?
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