no brakes, air is bubbling in master cylinder, no leaks. whats going on.

 

you have air in the brake lines,need to bleed them. buy a tub of brake fluid. this takes 2 people. pump the brakes quickly, then push it down all the way, have someone pour the fluid in slowly, as you slowly releases the brake. repeat over and over again, about 2 to 4 times. this should solve the problem, but if by any chance it desnt, you may have maybe a clog in the brake line, or a brake caliper may be froze. i doubt its clogged as there would be no bubbles appearing. hope ive helped

 

what also i find helps more is the power bleeder that hooks up to an air line and actually sucks the fluid through the bleeder screw. it takes out some seriously tough air bubbles in the lines