My gf has a 1994 honda civic dx, and recently when excelerating and coming to a stop the brake pedal is stiff and acting with no problems bring the car to a stop but when coasting to a stop and pressing the brake pedal the brake pedal will go soft and it will take putting the pedal to the ground to get the car to stop. I checked the brake fluid and there is enough with no problem. Is the master cylinder going out or something else?

 

theres a vacuum line on the brake booster. check that for leaks or cracks.

 

Hi, were you able to find out what the problem was? My car's brake pedal is slowly sinking to the floor and even when it is at the floor, it keeps slowly moving forward.
I would appreciate your input on your problem to determine if that could be the same cause to mine.
Thank you

 

This is 16 years old.