Engine/Transmission (1994 - 1998) no brakes

[WBerry]

Pedal goes to the floor. pump pedal wont hold pressure,hear a whoosh sound under dash as i pump pedal,thought maybe a line broke draining the resvoir,but its still full,any help would be great before throwing parts in a trial and error. thanks,bill

 

[Skydiver]

Sounds like a total master cylinder failure. If it has not gone dry and gasp air and you have no other leaks. Did you pull the cap and look inside the reservoir? Sometimes the plastic jug will get so stained it appears full. When you do get pressure be sure and do a full flush. First RR-LR-RF then LF.