Skip the auto shop - Our mechanics make house calls

Q: Master cylinder issues with vehicle. Hard to stop.

asked by on

Brake pedal occasionally goes all the way to the floor and I have to pump it to stop the car. I was told it could be a master cylinder booster or the master cylinder itself.

A: The booster won’t make your pedal go to the...

The booster won’t make your pedal go to the floor. If you bled all the brakes, and there are no leaks, then it’s most likely the master cylinder. You can take them apart and clean them, but if the seals are too bad then you should just replace then bleed the brakes again. A mechanic from YourMechanic can do the above as well as perform a brake safety inspection if you would like.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Heater blows cold when temp gauge is halfway. both heater core hoses are hot.

If both heater hoses are hot then the core is getting hot coolant flowing through it. You should check the temperature blend door actuator behind the glove box on heater case to see if it is operating the temperature blend...

Q: Stalling engine, brakes, power steering and transmission failure

The stalling may well be caused by a failure of the crankshaft position sensor. This device provides timing instructions for the ignition system. When it fails, the engine no longer gets spark at the spark plugs and stalls. When the...

Q: Hard to turn steering wheel when on park.

Hey there. There is a check valve in the power steering pump that quite often sticks after a rebuild. Since these are "restoration" components, they tend to sit on shelves longer than present-day parts. Tap lightly on the power steering...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...