Q: Car stops slower & brake pedal goes to floor

asked by on

I noticed that my car was not stopping as quickly as it used to. Plus, my foot goes down farther on the floor than it did before. My neighbor took a look and saw grooves on all four rotors, so we replaced those and also the brakes. But I still couldn't drive the car; it still had the same stopping problems. Plus, the ABS and brake warning lights came on. By putting in ABS rings, the ABS light went off. We also worked with the e-brake cable and that shut off the brake light. But the brake pedal Still goes to the floor.

Next, we examined the master brake cylinder and the rear calipers. Bled the brakes and now all four brakes have pressure when the car isn't running. But once I turn on my car, the brake pedal goes down to the floor. We have not tested on the road to see if this happens there. This stopping problem had started about two weeks before the brakes and rotors were replaced, and it only happened with quick stops and after it rained. Can you direct me to what needs to be done to find the solutions for this problem? Thanks.

Sounds like you may have some internal leakage in the brake master cylinder. The brake master cylinder, if it is leaking internally, will maintain fluid level and allow the pedal to drop. It is possible that the leak is small enough to support the pedal when it it is pushed when the engine is off, but may continue to drop further when the power assist is active from the booster.

The master cylinder may need to be replaced and the brake system bled. Due to this repair having high safety concerns, we have to recommend that you enlist the help of a mechanic, such as one from YourMechanic, who is qualified to safely and accurately diagnose the brake hydraulic issue and carry out the needed repairs to the braking system.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Car stops slower & brake pedal goes to floor

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Were my rotors really replaced?

The vibration you are talking about can indeed be caused by bad brake rotors and solved by replacing them. However, there are a few parts of the job that, if done incorrectly, can cause the problem to return very soon....

Q: I have an error code P2159 popping up on my Hyundai Sonata. I want to know exactly which speed sensor to replace driver or passenger

Hey there. If your Sonata does not have ABS (not sure any exist without ABS), the wheel speed sensor input is from the physical wheel speed sensor, located on the passenger front wheel hub assembly. If your Sonata has ABS...

Q: how to install front disc brake pads

Brake pads can be accessed by unbolting the brake caliper from the torque plate. If you are installing new brake pads, though, such must be done at the same time that the brake rotors are re-surfaced or replaced and all...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...