This can tap fitting is only a few months old, it came with a manifold KIT.

I have turn all the way down, then back up, no gas coming out.
This is suppose to be a "New Style R134a can tap fitting".

I have a new manifold, 1st use, the low side R134a can fitting won't allow gas to pass through. Anyone know why? I can put the fitting on the can, turn inward to open the valve, but nothing comes out. Is it a bad fitting? Will gas only escape with suction of the low side? I took the yellow tube/line...