Classic symptom of an internal leak in the brake master cylinder. Don't
screw around with rebuilding. It's not worth it. Get a new one from Ken
Wilford or Ron Salmon or one of the other list vendors., It's not a
difficult repair, and it's a good time to flush out all that old brake
fluid and along with it a bunch of dirt and water that you didn't know
you had.

Good luck

Regards,

John Rodgers
88 GL Driver

William Landsman wrote:
> Hello,
>
>
>
> What does it mean when you are stopped, lets say a light and your brake
> pedal starts to slowly lose resistance and starts to move toward the floor
> of the van.  When I take my foot of the break and reapply it the resistance
> is back and then it starts again.
>
>
>
> Thanks in advance for any advice.
>
>
>