Joined: Mar 2007
Posts: 9,182
Likes: 5,365
From: SF Bay Area, East bay
Bikes: Miyata 618 GT, Marinoni, Kestral 200, Soma double cross 2002 Trek 5200, KHS Flite, Koga Miyata, Schwinn Spitfire 5, Mondia Special, Univega Alpina, Miyata team Ti, Santa Cruz Highball, Waterford rs11
It may have just needed the seal to set into the valve. 20 psi is pretty low. I've used a drop of oil before to help it out.