Did you check for trouble codes?
Is the brake fluid level correct?
Is the master cylinder OEM? If the first replacement was bad after a few months, the second could be too due to quality of parts used. If this is the case, it is going to be a killer as you would not be looking at it again.

Answered by KHLow2008 (expert)
39,837 answers provided

I did check fluid myself and it was filled to line so no leaks. and no codes came up at shop also no engine light on. Could this be a bad caliper or wheel cylinder sucking air into lines or a bad booster. I don't have abs so I don't have actuators its just your basic system

Response from jeffholt1
1 question asked

Basic braking system would be much easier to handle. It cannot be a caliper fault as the fluid level is correct.

Only 2 things can cause this symptom.

1. Air trapped in system. If this is the case, the problem should be occurring more often and would usualy be the first stroke of the pedal after pedal had not been used for a while.

2. A bad master cylinder. I would go with this as per the symptoms and the reason is the quality of the part is suspect.

Perform this test and see what results you come up with.

Start engine and softly depress the brake pedal. When it stops moving, hold the pressure lightly and wait for a few seconds. Continue with a little more pedal moement and note if it continues to move. If not, back off pedal pressure lightly and depress again lightly. Repeat process of softly pressing and depressing at the point the pedal movement stops and note of the pedal height slowly sinks with each movement.

Answered by KHLow2008 (expert)
39,837 answers provided

If it is the problem of brake system, please check them out at http://www.miparts.com/cat_brake-pads_67

Answered by Miparts
0 questions asked