This sounds like the master cylinder has a problem with the check valves these are internal in the master cylinder. After removal of the master cylinder check to see if the rod coming out of power brake unit is threaded it may be to long and holding residual pressure in the lines keeping the front brakes applied. Testing for residual pressure is easy drive until locks up just turn bleeder screw without touching brake pedal if fluid sprays out fluid is not returning to master cylinder. good luck.
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Hi kiela , I want to help you with your problem, but I need more information from you. Can you please add details in the comment box? front or rear or both.
One day the front brakes just started to lock up so we changed the brake pads, rotor,caliper,barrings and the hoses and it worked for 2 weeks fine. then the other day it started doing it again. so we bled the brakes right there in the middle of the rd and it started working fine again. But yesterday it happed again so we tried to bled the brake again and now the brakes won't pump up. so i have no brakes at all.
Also its the driver front brake.
i drove it home yesterday using my e-brake
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