I went through my brakes, put on new rotors and pads, new back brakes, wheel clylinders, stainless braided lines, cleaned out the old nasty fluid from all the lines and put in DOT 5 fluid. what happens now is that the brakes will function great, good pedal for a indeterminate amount of times and then they will go to the floor and the brake warning light comes on! Sometimes it will be one good pedal and maybe the next time it will be 6 times and they always pump up fine. I'm stumped!