Does Your Vehicle Have Spongy Brakes?
You may have spongy brakes if your brake pedal feels soft and takes too much pedal travel or multiple pumps to stop the vehicle. In many cases the brakes just need to be bled to remove air in the system. Here are causes and solutions for mushy brakes:
Caused by: Air in brake fluid, caused by a leak in the system or overheated brakes.
Solution: Inspect system for leaks and bleed brakes. Consider upgrading brake parts that will resist overheating. 
Caused by: Excessively worn or machined brake rotor and/or drums.
Solution: Measure rotor's minimum thickness or drum's maximum diameter if possible. Replace rotor or drum if necessary. 
Caused by: Worn brake hoses expanding under pressure.
Solution: Replace brake hoses. If you have to replace one hose, then it's a good idea replace them all. 
Caused by: Worn brake master cylinder.
Solution: Inspect master cylinder and rebuild or replace if necessary. 
Caused by: Loose brake components not properly attached or torqued down.
Solution: Inspect all brake components for loose parts and tighten accordingly.
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