Hey guys I've got a question for you. My fathers AAR has been having some braking problems lately. It started with fluid leaking out the cap. We swapped caps, then put on two different master cylinders in the past. We also have been having a problem with the line lock on the front not holding the car doing a burnout.
Well today we installed a brand new master cylinder, and proceeded to bleed the brakes starting at the right rear, then left rear, then went to right front. Nothing comes out of the front calipers, nothing, we hooked up a vacuum pump and only got what looked to be burnt brake fluid out (very small amount), the front brakes do not work when tried either.
Any ideas? Do we have another bad master cylinder? Could the porportioning valve be doing this?

Thanks guys and sorry for the long post.