brake pedal will sink

1994 CHEVROLET CAVALIER
90,000 MILES • 2.2L • 4 CYL • 2WD • AUTOMATIC
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AUSTIN HALFORD
  • MEMBER
  • 2 POSTS
The car will roll about an inch or two, then the brakes will catch. If i let my foot off the brake and press back down it is back to normal. Looked for leaks but found none.
Apr 10, 2019 at 5:35 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,244 POSTS
Welcome to 2CarPros.

If the brake pedal slowly goes to the floor, there are no leaks, and the brake fluid is full, my first suspect is the master cylinder (MC). In the master cylinder there are plungers. Over time, they wear and even get brittle. As a result, brake fluid is able to bypass them and the pedal will drop. However, most times you can pump the brakes and get a pedal again.

Take a look through this link:

https://www.2carpros.com/articles/brake-pedal-goes-to-the-floor

If you decide to replace the master cylinder, here is a link that shows how it is done:

https://www.2carpros.com/articles/how-to-replace-a-brake-master-cylinder

Let me know if this helps or if you have other questions.

Take care,
Joe
Feb 25, 2021 at 1:48 AM
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