POWER BRAKE VACUUM

To rule out the rear brakes...

Disconnect the rear line at the distro block.

Put a plug in the distro block port. Bleed the brakes, crack the plug open to bleed the rear system as if it was a caliper.

Protect the rear line so it does not leak fluid, An appropriate cap or baggy tapped to the line etc. To keep fluid from hurting your paint etc.


you will only have front brakes, but if they and the master are blead correctly and in propper working order you should have a firm pedal feel no pumping needed.

Do the same with the front brakes. If the rears feel spongy then you know where your problem is.