I was wondering if anyone can tell me what the problem can be with my brakes. It seems to happen when the car has been running awhile. When stopping, the brake pedal is very soft and will actually go all the way down to the floor if I do not pump the brakes. I have changed the brake fluid and bled the ABS system too. It is intermittent and I am not sure where to start to find the problem. Any insight would be appreciated.