Symptom: Brake pedal travel is almost to the floor if I don't touch the brakes driving 15-20 min. and then apply brakes. I can pump the pedal one time and I have good braking. Sometimes the ABS & TC lights come on, sometimes not. On starting, I use to hear the booster pressure hit the brake pedal and make a faint sound and the brakes were hard. Don't have that now. Replaced the Accumulator before it seem to get real bad, but it didn't help. Any Thoughts?