My brakes do not build pressure! Why?
There is no leak in the system, I have blead every line and no air is coming out, i've inspected all lines front to back, no leaks, but the system does not build pressure,
* Important Note * the Pedal does get pressure way down low, but does not sink! But pumping the pedal up does not build up pressure to a nice pedal height.
This is a 69 Mustang that originally had four wheel drum brakes. I've put a disk brake conversion on the front, the kit supplied a brake booster, master cylinder, front calipers, pads and rotors, I used the existing proportioning valve, and thus all other parts.
* Another Important Note * the car has sat now for 9 years, and the system was barely ever used.
Could the Master Cylinder be the problem? Thoughts!!