Sounds like some cross-mojonation.

 

Took it out & no juice! I also hit the purge button again & you can hear it purging, but no nitrous cloud this time.

 

Not a bad idea, and I do this myself. What i have done is set up a fitting with a air fitting so I can unhook my bottle and hook up compressed air. much easier on the pocket book when checking things like on/off rpm and any other test parameter.
Robert