Brake Pedal Drops to Floor Randomly? Master the Emergency Maneuvers

It sounds like you have a failed master cylinder. The fluid is by-passing the piston cups, thus the pedal "fades" to the floor, instead of applying pressure to ... It's not uncommon for the seals inside the Master Cylinder to get damaged if the brake pedal is depress or pushed ALL the way to the floor while ... A sinking brake pedal slowly drops to the floor as you exert the same pressure. You'll be able to feel the pedal sinking when you're stopped at a stoplight or ... The brake pedal goes to the floor with very little resistance. It isn't spongy like there is air in the lines. It just goes to the floor if you push it all the ... Either you have air in the brake lines somewhere or the master cylinder is shot. As GBAUTO alluded to, if the master cylinder was allowed to go ... Misaligned brake shoes. If your car has rear drum brakes and the brake pedal goes to the floor, the rear brake shoes could be out of alignment. When I push the brake pedal, it goes all the way to the floor on the first push, and then on the second push it goes halfway and the brakes bite properly. The brake pedal goes all the way to the floor. There was brake fluid in the rear brake fluid reservoir, but not the front. Where do you suggest I start ... Full Access Member ... A bad booster won't cause a low pedal, just the opposite. The pedal will be hard and high. OP says it's going to the floor. It turns out that it was caused by one of the rear wheel cylinders leaking brake fluid past the piston cup seal. The internal cups weren't ...