Hey guys so my 70 cutlass supreme with front disc brakes and rear drum brakes has no pressure. - just recently installed new front calipers and rebuilt the rear drum brakes with all new hardware.- then bles brakes properly,no leaks and the master cylinder is topped of with fluid.my problem is that I still have no good pressure.the cars stops but the pedal almost hits the floor.what could be wrong with it? The lines are not clogged because fluid comes out without any airbubbles and again no leaks. The booster and master and prop valve seem to be the originals and the car has 65' original miles,any guess?

 

i have the same problem with my 84 hurst/olds

 

Push on your brake pedal and start the car. The vacuum booster should pull the brake pedal closer to the floor if it is operating correctly.

I am having brake troubles as well. I know it is a pain. Good luck!

 

Alright guys finally fixed the brakes,so i replaced the master cylinder(autozone $14 plus core charge) I made sure everything was nice and properly installed and then i just finally broke down after trying to bleed the brakes so many times and decided to take the car to a shop with the proper equipment to bleed the brakes,the brakes are realy good now.so go out,replace the mc and drive the car.