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Brake pedal goes to the floor

Tiny
BUSTER14
  • MEMBER
  • 2001 CHEVROLET S-10
  • 4.6L
  • V6
  • 2WD
  • AUTOMATIC
  • 190,000 MILES
I just replaced the proportioning valve and am bleeding the brakes. Brake fluid squirting out at all points. Still pedal goes to floor. No braking power. Air bubbles in master cylinder. Do I need a new master cylinder? Vacuum booster checks out okay.
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Monday, October 6th, 2014 AT 8:51 AM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

So where is it leaking from?
Is it from the proportioning valve? One of those lines?

Air bubble in the master cylinder could just be due to the leak as it allows air to enter the system.

So, the first step would be to fix the leaks. Then fill up with brake fluid and bleed the brakes.

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

I have attached the brake bleeding procedure below.

Let me know a little more information about what you are experiencing.

Thank you.
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Monday, January 10th, 2022 AT 10:31 PM

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