Brake issue

[Mosescase]

I have a 93 mazda b4000. The breaks went soft then just went out. There is no pressure at the pedal, just goes straight to the floor. There is fluid in the line and the break booster. I have not tried to bleed the breaks for the simple reason that I know there was a leak at the rear but now its not leaking anymore even with the e-brake pushed in. So I am thinking it maybe the Master cylinder or the break booster itself. Any Ideas?

 

[GotWood]

E brake is mechanical. There is either a leak somewhere or not, period. There should be no fluid in the booster, if there is then the problem is the master cylinder is the problem. Start bleeding the brakes at the passenger side rear then driver rear, passenger front then driver front. The reason for this order is farthest from the master cylinder to the closest.

 

[drkelly]

Most likely the master cylinder leaking internally.