Thank you for all the reply and all the exlpanation, it helps alot. but yeah, i've reseach alot and change out many other car pad and shoe . bascially, it's just a autozone pad and shoe, those pad and shoe should have broken in for at least serval thousnad miles before I post this message, so it's reasonable enought for it to broken in. I'm supecting the brake booster is not working properly, the reason is that it does not give me enought assist to apply the pressure to the brake, the pressure to the brake will only silghty increase even thought I step on the brake very hard. on the highway its' very diffuclt to stop the car, and the respond are very slow , so I though thte seal of the MC but the fluid still remain and I check all the line don't see any leak. thats the problem, can somebody explain how to test the booster?
