Identify Paint Sprayer Air Intake Problem

So I'm working with my sprayer. The thing started sucking air. I've got, you know, maybe a half a gallon of paint in there and I'm gonna use a sprayer saver. A sprayer saver will just have your five gallon bucket or gallon bucket or a quart tilted right there. Now your paint's gonna move to one side and you're not gonna suck air. You can get all the way down to just a tiny bit of paint.