I dont mean from the rubber steam bit, thats fine, basically i was checking the pressures as you do, then i took the pump off the valve and the air just comes out as if your pressing the button with your finger nail, obviously this is stuck in, ive tried moving it with a knife/pen and putting the pump back on and off but its just pissing out

The only thing stopping the air is the valve cap thats screwed on, why does this have to happen on a sunday

Can it be unstuck somehow or is it to the garage and new valve time?