Non-Mustang - brake master cylinder?

[sigtauenus]

Power brake car, not a mustang. 1993 car, 220,000 miles. Brakes work fine. When I'm sitting at a light, the pedal sinks to the floor. Although pedal has sunk to floor, brakes continue to hold just fine. I have no loss of fluid or leaks that I can tell.

Symptoms seem to be an internal leak on the master cylinder piston. Does that sound right?

 

[AzPete]

Yep, sounds like a master cylinder internal leak.

 

[Starfury]

I agree.

 

[sigtauenus]

Thanks guys. Not in the mood to yank a MC and bleed the system unless I really have to.

 

[AzPete]

Sounds like your mood might have to change....... :sad

 

[sigtauenus]

I was thinking that as I posted that. :sad

 

[FordDude]

Sounds like you need a mood ring.

:lol :craz

fd

 

[Mach1Rider]

Check the antilock dump valve for residual build up.
Sometimes a good flushing will cure this problem or it needs to be replaced.