Not blowing cold air

toolmanmike said
You obviously have a leak or it wouldn't be empty. Unless you have a gauge set, a evacuation pump, and the correct oil and refrigerant you would be best to find a professional. And that's at a minimum. It takes special tools to diagnose and repair leaks.

It's not empty right now I dont think, I can press this and stuff comes out now.

It was empty. I dont think the PO ever charged it after swapping this engine into the car.