I needed to replace the pads and rotors but the calipers ended up needing to be replaced also. The problem is I have tried to bleed the system for two days now with no luck. The pedal still hits the floor with very little effort and I have run over 32 oz of fluid through the system. I was thinking it might be the master cylinder but I thought I would ask before I started replacing parts. Also the proportioning block will shoot a little fluid out of the top valve with the rubber cap removed when I pump the brakes. That doesn’t seem normal to me either.

Thanks for any help

 

Why the calipers also?

 

One of the calipers was bad. It was all I could do to get the piston to compress with a large C clamp. I think that the problem is in the master cyl.