Ok. The problem has not gone away.
Let me explain. At the field I put together the airplane gas it and charge the air retract system, start the engine and open the throttle for max RPM as I'm doing this I can watch the air meter go from 100 psi to 0 psi, it only takes about 40 sec. to deplete the air. The servo and the air valve are mounted on the side of the fuse and former. I'm thinking that the vibration from the engine is somehow moving the air valve or the servo to much for this to happen, remember this only happens when the engine is running and at no other time.
Do you think I need a new air valve?

The air valve that I have is old, the one you had to use wheel collars to set the travel distance.



Carlos