Sounds as if the booster has failed, but to prove a point, hold pressure on the brake pedal and have someone crack open a bleeder, if the pedal goes down easily, I would suspect a booster or vacuum check valve failure. If still binding, look at the pedal pivots, just make sure that the bleeder is closed off before lifting the pedal so no air is drawn into the system.
SPONSORED LINKS
Friday, March 9th, 2018 AT 3:22 AM