Recently I have a brake feedback problem. I put new brakes on it last spring at 197k, new rotors and pads. New hydroboost in August. Power steering pump last summer. Randomly when i go to use the brakes the pedal will go to the floor with no response until almost the floor, and they are very weak at that point. If you let off the pedal and hit it again it will be firm and work fine. There are no brake line leaks and the fluid is where it needs to be. It use to do it once a month and now its like once an hour. Any ideas?