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What makes my brake pedal go to floor by its self

Tiny
ANGLIN13
  • MEMBER
  • 1985 FORD BRONCO
I have an 85 bronco and when I barely press on the brake pedal it goes to the floor by its self. What causes that?
Saturday, June 9th, 2012 AT 5:07 AM

3 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 33,922 POSTS
An external brake fluid leak or an internal leak in the master cylinder. Have you checked the brake fluid level?
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Saturday, June 9th, 2012 AT 8:54 AM
Tiny
ANGLIN13
  • MEMBER
  • 2 POSTS
Yes I have and even changed the master cylinder and checked for thru out whole system
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Saturday, June 9th, 2012 AT 11:00 AM
Tiny
CARADIODOC
  • MECHANIC
  • 33,922 POSTS
Would be really helpful to have all these details right away so we don't waste time getting to the solution. Why did you change the master cylinder? Was that to try to solve the low pedal or did the low pedal start after that? Did you bench bleed it or just throw it on and expect it to work? How did you bleed the system? Have you checked the rear brakes for a rusted adjuster cable?
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Saturday, June 9th, 2012 AT 6:45 PM

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