92 brake problem
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New User
Joined: Feb 2005
Posts: 8
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92 brake problem
I have a 92 F250 that I just had the rotors turned and new pads installed. The brake pedal will slowly go to the floor when stopped at a stop light. The brakes stop allright it's just the pedal wants to go to the floor. What gives.
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Postmaster
Joined: Jul 2005
Posts: 3,956
Likes: 6
From: Abilene, Texas
hello snowdutt, welcome to FTE.
now about your problem. You have what is called a fading brake pedal. check for leaks in the system, if you dont find any then you probably have air in the line. If you had this job done at a shop I would take it back to them, and have them fix it. GL
now about your problem. You have what is called a fading brake pedal. check for leaks in the system, if you dont find any then you probably have air in the line. If you had this job done at a shop I would take it back to them, and have them fix it. GL
Postmaster
Joined: Jul 2005
Posts: 3,956
Likes: 6
From: Abilene, Texas
yes, I you could have an internal leak in the MC (I could be worng on this thou) that would cause the problem as well. just make sure the brakes are bleed well. if so then you might look into the MC.
Post Fiend
Joined: Mar 2002
Posts: 19,402
Likes: 38
From: Bonita Springs FL
A slowly sinking pedal is a bad master cylinder 99% of the time.
The reason that it happened after you bled the brakes is that you haven't been regularly changing your brake fluid (not that anyone else does, including myself) and you have some internal corrosion in the master cylinder. The bores are squeaky clean where the seals normally ride during normal use, but the plunger goes MUCH further into the cylinder and tears up the seals on the corroded part of the cylinder bore.
The reason that it happened after you bled the brakes is that you haven't been regularly changing your brake fluid (not that anyone else does, including myself) and you have some internal corrosion in the master cylinder. The bores are squeaky clean where the seals normally ride during normal use, but the plunger goes MUCH further into the cylinder and tears up the seals on the corroded part of the cylinder bore.
