or just unplug the hose from the front of the ram. if air comes out the ram its the shaft o-ring.
lpr too high will cause noid to vent. or solenoid gasket could need replacing if your sure its set in place properly. a very light coat of grease helps. if rebuilding the lpr or the ram shaft isnt it the gasket may need replacing. www.paintballgateway.com has them.