I have a 93 civic Si and my brakes are not holding pressure. I will be sitting on a hill with my foot on the brake and the pedal will just get softer and softer until i start to roll.
i have changed the Master cylinder and bled the lines (2x) and i am not sure what else to try. Could the proportioning valve be bad? or the brake booster?
Reps will be given for helpful info
thanks