brake pedal randomly goes to the floor
 

91 s15 jimmy title pretty much says it all, pedal goes to floor but still holds a little randomly. let off and hit them again will be ok. i dont see no leaks nowhere and the fluid is still full. im thinking maybe internal leak on master cylinder, anyone else have any ideas before i replace that

Re: brake pedal randomly goes to the floor
 

Sounds like the master is going bad.