Brake pedal goes down to the floor before stopping the vehicle

Tiny
PAT ELIMINATOR 70
  • MEMBER
  • 1970 MERCURY COUGAR
  • 5.8L
  • V8
  • 2WD
  • AUTOMATIC
  • 78,000 MILES
Replaced master cylinder, proportion valve, front calipers, rear wheel cylinders and bled brakes (several times). I have checked the brake lines for leakage.
Sunday, June 16th, 2019 AT 4:39 PM

1 Reply

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

You either have air in the brake lines or a leak that is allowing the brake fluid pressure to bleed off. I have included a link below for you to go to:

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

Please go through this guide and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
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Sunday, June 16th, 2019 AT 4:51 PM

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