I am hoping someone can help me, I am at a loss. Beginning of the winter my brakes stopped working. I would press the pedal down to the floor with very little stopping. I have since ended up replacing both front and rear shoes, drums, cylinders, and a few brake lines as needed. I have tried to bleed the system three times, I have good flow and no air at all four wheels. However when I press the brake it goes all the the way to the floor on the first press. After about 3-5 pumps it no longer is spongy or goes deep into the press. I am not sure what is next. Anyone have any insight?