Why is my brake pedal not working properly?
When the piston is stuck in the applied position, you can see the ports supplying fluid are blocked and will not fill the cylinder and operate properly. You can verify this condition by removing the master cylinder from the booster without disconnecting the brake lines.
Why are my drum brakes not building pressure?
The brake shoes on drum brakes need to be adjusted properly before you can successfully bleed the brakes. If you don’t, air may still be trapped, and you will not be able to build brake pressure. Note that this only applies with drum brakes, not disc brakes. Do this on all brake shoe adjusters, one at the time.
Where can I get a low brake pedal diagnostic?
If you desire that this problem be diagnosed by a certified Mechanic, dispatched by YourMechanic right to your location, please request a low brake pedal diagnostic and the responding mechanic will get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic.
Can a clogged proportioning valve cause excessive pedal travel?
If the wheel bearings are loose, that will cause excessive pedal travel. Also, it is possible that a clogged proportioning valve could play a role in this. To answer your question about safety of operation, you are right that in this particular scenario, it is manifestly unsafe and unwise to operate the vehicle until it is repaired.
When the piston is stuck in the applied position, you can see the ports supplying fluid are blocked and will not fill the cylinder and operate properly. You can verify this condition by removing the master cylinder from the booster without disconnecting the brake lines.
What to do if there is no pressure on the pedal?
Put a light, steady pressure on the pedal. Start the engine, and operate it at idle. If the maintained on the pedal. As I also said, when I was using the pressure bleeder, it would hold the 10 psi the whole time and wouldn’t drop.
What happens when your brake pedal sinks to the floor?
If the pedal sinks to the floor, there is an issue in your braking system that should be addressed as soon as possible. The inability to stop quickly is very likely to cause a serious accident. Technically, there are three main causes that would make the brake pedal sink all the way to the floor.
If you desire that this problem be diagnosed by a certified Mechanic, dispatched by YourMechanic right to your location, please request a low brake pedal diagnostic and the responding mechanic will get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic.