My brake pedal went to the floor last week, pulled the master cylinder and manually activated it and fluid came out both ports. I checked for leaks under truck. Found none. Put new mastercyl. On and the pedal still goes right to the floor. The brakes were working fine one day and now the pedal just drops right to the floor. Also the fluid level doesnt go down when I pump them. I also backed up the truck several times with no change. What am I missing? Is there a sensor or something electrical that can be causing this? I'm at a loss. No vacuum leaks. Can the power booster be bad?
Wednesday, April 20th, 2011 AT 4:46 PM