Subject: brakes not working
Question: I have bled my brakes over and over. I do not get any resistance from the pedal until I start pumping the brakes,then after a few seconds brakes go soft again. I just tried to replace my rotors and I put everything back together and there was no presure in the brakes. I dont have any idea what the problem is, I have bled my brakes until the new clean brake fluid is coming out. I have bled my brakes many times before and have never encountered this problem. Any help will be greatly appreciated.
02 Mitsubishi Lancer
2.0 ES Manual
56k miles
Answer: When replacing rotors, the calipers typically do not have to be disconnected from the brake line, making bleeding unnecessary. If you have tried bleeding the brakes per a service manuals instructions, and it does not work, you need to inspect the brake master cylinder. If a spring in the master cylinder has failed, your brake pedal will most likely go all the way to the floor. Also, there is a brake booster on the car.
That booster has a metal diaphragm in it that aids in your power braking system. If the brake booster has failed, your brakes will always seem spongey.

Though you have a lot more miles on your car that may put you over your basic warranty, this problem may still be covered if there indeed is a problem with your braking system. Take your car (probably by tow truck if the brakes don't work) to the dealership and have them inspect the master cylinder and brake booster if you are unable to. Your problem may be found there.
Good luck!