losing the brake pedal

This problem is intermittent, and seems to coincide with hotter weather. Whenever the temp is up.......the pedal goes to the floor. I started to notice while sitting at red lights the car would start to creep forward and the brake pedal would slowly go to the floor. If I pump the pedal a few times it will stop this nonsense and the pedal will become stable again. I have inspected for fluid leaks, and there are none....no loss of brake fluid. I was told a caliper or piston could be siezed up causing the problem. Also, the car sat for almost 2 years waiting on engine repair..if that helps.


thanks

Craig

master cylinder developed internal leak.

if it gets worse....I will replace master cylinder. Do you have any idea what they go for OEM? I do not want an aftermarket turd. Thanks for help.

check it out for yourself
http://www.hondaautomotiveparts.com/