For OP: If your geo 2.1 shoots while degassing, remove your reg. Where it screws onto the body there should be a small, golf tee looking white piece (called the pressure control valve, or PCV). Remove this, wipe it down and replace and see if that helps.
The PCV has a small hole through the middle so that it slows the release of gas in your marker, causing no shot when degassing.
For the other poster: On a Geo, Geo+, or Geo2 the PCV is located in the 90 degree macro fitting that connects to your HPR. Remove the elbow, wipe the PCV down, replace. Hopefully that will take care of both of your issues.
Atlantic/Haze Geo 3
Last edited by ammoeller : 09-18-2012 at 09:16 PM.