And i can get the pedal pumped up so I don't think it is the hyrdovac unit. I just can't seem to keep a solid hydraulic system currently.
When I got my truck it turned out it had multiple problems. First I could get the system pumped up but it would'nt stay that way....turns out it was the hydro vac leaking internally. When I got the h v replaced the pedal stayed up but after a few pumps the brakes would lock and stay locked. That turned out to be the plugged port in the master cylinder.
Just sayin........
