Originally Posted by
sirharper
Circling back on this. I did this and found the brake pedal to be very firm and what I consider normal when the car is turned off. When running however the pedal goes back to being soft. Do those finding indicate what might be wrong between air in the lines or master cylinder? Brake fluid level is very normal and no signs of leakage.
The only thing that changes is the ABS system is turned on and I suspect that the control unit takes up the fluid but if it is full this should not matter. Is the cause of the problem air in the ABS system?
What one person calls a soft pedal another may say is fine. We have no way of comparing two or more cars if they are not side by side.