Skip the auto shop - Our mechanics make house calls

Q: Brakes still going to floor

asked by on

I was having issues with my brakes hitting the floor. I could still stop okay, but not as fast. I took it to a shop where they replaced the master cylinder and a leaky brake line. I was still having the same problem. They ran some more tests and diagnostics and determined it to be the ABS module. My brakes function a lot better, but every once in a while they still slowly drop to the floor and I lose braking power. It seems to happen most often when I need to brake for a longer period. As far as I know, there's no air and the lines have been bled properly.

My car has 118000 miles.
My car has an automatic transmission.

This may suggest your brake booster is failing. The brake booster is a mechanism that uses vacuum pressure to take the force being applied to the brake pedal and amplify it. If the booster is bad, then the full amount of force needed to activate the master cylinder and pressurize the brake fluid isn’t going to be there. The pedal will go all the way to the floor and the car will be harder to stop.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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: Car dies when I apply brake and turn wheel at the same time

This may be a result of a dirty or failing idle air control valve. The idle air control valve reads the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and...

Q: Rear right brake lights. 2000 GMC C2500

Hello there. Brake and turn signal light faults are one of the most common repairs on the 2000 GMC C2500. The brake light bulbs are a dual filament bulb. One side is lit all the time when the vehicle's headlights...

Q: Had bad brake booster after pulling trailer replaced still has vacuum leak inside cab ?

Make sure you do not have a vacuum leak between the brake booster and master cylinder. Sometimes the seal does not sit good and will leak. If it is okay, and you hear a vacuum leak inside the vehicle, then...

Related articles

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...