Brakes

We can't get any pedal pressure nor is the pedal returning all the way once released from pressure. We've done the following:



1.) bled them many times.

2.) Found two small leaks and fixed them.

3.) Loosened the nuts by the pedal base to allow them to move freely.

4.) Readjusted the brake pedal so that it leans toward the driver.



We're wondering if the master cylinders are bad or maybe one is bad which doesn't allow

for it to return due to scoring in the cylinder? I have no idea why we have no pressure since all the air has been bled out of the system....



Thanks for your recommendations!



Mark