Every few seconds or constantly (when it feels like it) there will be a hissing sound coming from my PCV valve.. my putting my finger on the rubber cap on the valve (drivers side) I can feel it doing this.. does this mean the PCV valve is screwd or more like a leak in the vacuum hose somewhere?

 

YOu have a leak. Replace the hose pcv valve and grommit that goes around it if you cant tell which it is. But, chances are it's probably the hose. This should cost you less than 5 bucks for all three.