Well, let me see if I can give you some pointers on getting it to shoot somewhere close to right for you.
There should be three adjustments on the gun, two of them will be on the back of the gun near its top and one will either be at the bottom, like an Iwata, or on the gun's side, like a Sata. Here is what you need to do with them. First its a very good thing that you got a gage at the gun, you need that. Turn your air pressure in the line up to the gun up all the way, to 100 pounds or so, and leave it there. Now turn the pressure at the gun up to about 30 or 40 pounds. Next hold the gun in your and and pull back the trigger to blow air, but no paint. Find that odd adjusting knob, the one that is either on the bottom or the side, and close it down and you'll see the pressure at your gage go way up, now open the adjuster on the gun slowly and watch the pressure begin to drop. Keep opening that knob until the pressure quits dropping, and then quit. Now move back down to the pressure regulator at your gage and adjust it for your 29 pounds or whatever it is your gun manufacturer recommends.
OK, next adjustment. Now you move to you trigger pull. This will be the adjuster on the back, probably the lower of the two. This one will effect trigger pull. I should have told you to do this first, but what you need to do is screw this adjustment all the way in - not too tight, just seat the needle. Now while counting turns, while pulling the trigger, start unscrewing the adjusting knob until the triger has moved all the way back. It should take about 4 turns, maybe 5. Whatever it is screw the adjuster all the way back in and then back it out half the number of turns to full trigger pull. This is just a safe starting point, about half trigger pull. You can open it up to three quarters way if you want but I do not suggest that you open it up all the way at first. As you paint open this adjustment up a little bit at a time until you get a paint flow that you feel comfortable with with the speed you like to move.
Now the final adjustment, which is the fan pattern. Tape a piece of paper up to the wall and hold your gun back from it about 9" or so and give the trigger a very quick blip, just pop it open and shut. It will blow out a pattern of paint on your paper and what you want to do is adjust that knob until that pattern is first of the height you want and then sort of vertically cigar shaped with even paint distribution all across that pattern.
So now you've got it pretty well adjusted and you can make any subtle changes you need to as you shoot your first coat. Set up like I recommended it will probably shoot a little bit dry, and if that's the case open up the trigger pull a bit. If you're getting runs open up the air a bit (at the handle, not at that cap pressure adjusting knob - leave it alone).
There. That help any?
Kong.