Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - Brake pedal goes to the floor sometimes
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Old 10-19-2012, 11:23 AM   #16
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Location: Freemansburg, PA
What I Drive: 2005 Gray ZXW

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Originally Posted by focusgg View Post

Focusfanatic Grumpy said it best, in my opinion:

"If you can get the pedal hard by letting the pedal up and then quickly applying the brakes again, it ain't air in the system, but assuming there are no external fluid leaks, you've probably got the master cylinder bypassing fluid (fluid leaks past a piston seal). Usually will be noticed when applying the brakes for a relatively long time, and the pedal will slowly drop towards the floor. It IS NOT normal. Get to a dealer.......the warranty should cover it. It is not normal wear and tear on the brakes."

However I would like to avoid the dealer if possible. Does anybody have any experience with replacing the master cylinder on an '05 Focus? Is a pressure bleeder or specialty dealer tool really necessary?

I actually don't mind spending the money on a pressure bleeder since I'll probably come out ahead of a dealer repair bill anyways, I'm just wondering.
OK, makes sense - I will proceed with the assumption that the brake master cylinder is the culprit.

Originally Posted by SoCalFan View Post
On my 2000 with ABS the instructions are to use special Ford test equipment when bleeding the system if air has entered the ABS unit. Since that was not the case, I only had to be sure to bench bleed the brake master cylinder before installation. My fluid was very contaminated so I used this opportunity to dump all of it.
I will do a liitle more digging, just to make sure that i have everything i need - too bad Ford doesn't offer up this information freely to it's customers. I just can't have anything go wrong - no car means no work!
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