dstrong464

2002 F150 FX4 brake pedal keeps going down after stopping truck. My initial thought was master cylinder. R&R'd master cylinder, bench bled, bled all 4 corners, same problem. Pulled the wheels, pulled the calipers and checked for leaks, found none. All pins were well lubed, no swelling lines. Put all back together, same problem. ABS module bypassing or leaking? Any help is appreciated.

Good old Bill

Master cylinder is no good.