Question about 2001 Ford Focus
The problem is likely either the brake booster which is vacuum powered or the brake master cylinder -- brake booster would be leaking air, master cylinder would be leaking fluid by the O-ring on the piston (internally "leaking by").
This sounds more like a booster failure since the pedal gets soft when engine is started. But probably a good idea to replace both at the same time.
More info, please let me know.
Posted on Oct 02, 2009
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Posted on Jan 02, 2017
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