I just completed a brake job and changed all calpers, pads and rotors. I bled the brakes and I had no pedal. I replaced the master cylinder and then I got a good pedal. I took the car out for a test run and everything was OK. The next day I was going to work and started to go on the highway and the car started to shake. I pulled over and the brake pedal was very hard. I started again and then the shaking went away and the pedal was back to normal. This has happened other times and I do not know what the problem is.
Apr 21, 2009 at 10:18 AM