The breather tube on these engines are sucking air in...you can feel the slight suction covering the tube with your finger at idle. Also on the Techinfo site at KIA the diagram showing the air flow pattern for the EVAP system shows fresh air going IN through this tube not out...leading to the need for a mini air breather.
On my old 01' Elantra a tube like this right next to the PCV valve (old 2.0 Beta engine) definitely blew sh*t out into the snorkel filling it with oil. But this engine (Theta) doesn't seem to follow that same air flow pattern.
