brake master cylinder going bad/junk?

I've got a Mazda 626 recently and I can only get brake fluid out of the front line of the master cylinder and the brake pedal only works when its all the way to the floor I must also say that it is a race car and the abs unit has been bypassed also is the what lines on the master cylinder feeds each portion of the car? Front line for the front of the car or rear line to the front again I can only get fluid from the front line so if the master cylinder is junk please comment

thanks

Have you tried bleeding the brakes? If not, give it a shot it might just be air in the lines. Also, check all the lines for leaks. If the lines are good and bleeding the system doesn't help, there may be something wrong with the master cylinder or possibly a slave cylinder issue.

I have the front brakes hooked to the front line on the master cylinder but u can not get any fluid from the rear line even when I put a vacuum bleeder on the master cylinder it's self not fluid comes out even at 25 psi back pressure