[turnpike boy]

Does the car have a residual pressure valve? (usually up close to the master cyl.) If so, pull it out. If not, check to see if the adjustment rod on the master back to the pedal is backed off enough to release pressure in the line. Have somebody stand over the master while you work the pedal; if you get some fluid movement in the master you're probably ok. If not, back off the adjustement rod about 3 or 4 turns and check again.