Leaks down the barrel in between shots is due to an oring on the poppet being bad or the poppet being unable to close due to swollen orings or lack of lubrication.
Leaks From around the solenoid area are caused by the solenoid orings or the solenoid itself is bad.
Leaks from around the macroline are caused by scratches on the macroline or the oring inside the connector being bad.
If the engine is still not operating correctly contact Valken Customer support.