Hay my brakes went out. Just driveing down the road. I went to stop and the pedal felt spongey and went to the floor. There are no leaks any where. So I replaced the master cylinder and I bench bled it. But there is still no pedal it is the same now as when the old master cylinder was on.
The problem might not be the master cylinder. Start at the master cylinder and bleed that. Then work you way to both front brakes making sure you bleed all the air out. Then work your way to the rear bleeding each rear wheel. If you just bled the master cylinder then aidr could have gotten into the system