Mystery brake problem

brakes
kia
sephia

#1

Hello, my 2001 Kia’s brakes have an extreme amount of play in them. The brake pedal has to be within ~1" of the floor to even engage the brakes, when the pedal is pushed to the floor the car begins to slow down but only at a fraction of the rate it should. It takes WELL over twice the time to stop. The brakes have been bled by 5 separate auto shops in 2 different states. A cracked master brake cylinder was found and recently replaced, still no change. It has progressively gotten worse over the last 3 years. Every mechanic has recognized the problem, yet has no explanation. Thank you for your time and any suggestions.


#2

Does it have drum brakes on the rear? Are the self-adjusters working? How does the parking brake feel? After that, I would replace all the rubber flex lines in the system. One of them could be ruptured and blowing up like a balloon but not leaking. Next, take a second look at that master cylinder…


#3

Does the hand brake work at all? In quite a few cars the rear brakes are adjusted by repeated use of the hand brake. I’d just pull it tight, then release it, a bunch of times. You can just sit in the car and do it anytime. Otherwise, I agree with Caddyman 100 percent.


#4

It turned out that the new master cylinder was faulty! The shop put in another one, the problem was solved instantly. Thanks for the advice caddyman/wentwest