This a little off thread, but I'm having problems with my 923a2 intermittently rapidly leaking down its primary air supply. The secondary stays good as long as I don't draw much air. As soon as I rev the truck up, that air comes back up to 120 +- psi and sometimes stays there fine; other times it drops back down to about 20 psi if I let the truck idle. I've walked around the truck and I hear no leakage, and when I parked it a little while ago the air stayed up, even at idle. Any ideas?
Thanks for letting me hi-jack the thread.
Tommy