Brake Pedal Drops to Floor Expert Troubleshooting and Repair Techniques

The theory of a dual master cylinder is you'll still have front or rear brakes if the opposite end of the car/truck fails. Usually by the time ... Could be a bad booster, bad master cylinder, brake lines, wheel cylinders or caliper. It really just depends on what else is going on. You may ... I started the engine, tightened the hose clamp all the way down til there was no vacuum and loosened it til the pedal felt right. it takes about ... The brake pedal still slowly goes to the floor. It is drivable and stops great, but at a stop light I need to let up and step on the brake pedal a couple of ... The truck wouldn't stop unless you put your foot to the floor. After bleeding all the wheels again, same problem. I found out there is a "fifth" bleeder ... 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 ... Brake pedal goes to the floor. Comments rated to be Good Answers: These comments received enough positive ratings to make them good answers. Reasons for a brake pedal going to the floor. 1. Leaks. You say you have none. 2. Bad master cylinder. You say you replaced it. 3. Bad brake booster. 4. Air in ... While you have the booster off and the vac line is disconnected turn it upside down to make sure fluid has not accumulated in it. When you go back together with ... The symptoms were the pedal just going to the floor with no resistance, but I could pump it and get back what felt like full control almost right away.