I need some advise on problem that I've been having with my brakes as of lately! My brake pedal has been hitting the firewall and I was told to get my master cylinder changed...so I took the car to the mechanic and he said that the brake booster was the problem! He installed the master cylinder and bled the brakes etc and the same problem occurred! Does the brake booster have anything to do with the ABS system because the ABS light never came on? HELP!!!