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Brake pedal goes to the floor

Tiny
1967DODGERT
  • MEMBER
  • 1999 TOYOTA TACOMA
  • 3.4L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 195,000 MILES
Very little stopping force. This was an all of a sudden thing. Won't pump up. Not a slow going to the floor, almost nothing(resistance) until almost to the floor. No leaks evident and fluid level good. New master cylinder, pads and brake lines about a year ago. Non ABS brakes. I think it's the master cylinder or brake booster. How to determine which one?
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Monday, March 14th, 2022 AT 3:59 AM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

The booster will not cause this. This is a master cylinder failure as that is where the pressure is developed.

Use a rebuilt or new cylinder and bleed them out well.

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

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

https://www.2carpros.com/articles/how-to-bleed-or-flush-a-car-brake-system

Let me know if you have any other questions.

Roy
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Monday, March 14th, 2022 AT 5:10 AM

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