Help! A-5 Dry Firing

So a few months ago I went out to the local field to play. My A-5 started to dry fire on semi auto after just a couple of shots. After taking off the hopper I found that the cyclone would stop after a couple of shots. I had plenty of air in my tank. I had a buddy of mine that runs the field take a look at it. He could find nothing wrong with the cyclone. I went home angry that I could not use my A-5 that day. First thing in the morning I knew what the issue was and I went to work testing it. One of the screws on the gun were loose. I set it to semi auto and shot it. It worked fine. This past weekend I went out to play.....if you want to call it that.  I set it up to shoot on pull & release and after about 4 to 6 paintballs it started dry firing again. I set it to semi auto and it would work fine. Once again I took the hopper off and the cyclone was not turning when I shot faster then semi auto. Any help would be appreciated.

Besides a 14'' J&J Barrel with Apex  & g36c shroud no... nothing internal has been changed from original. Oh and I am using HPA with a remote coil.

Just tested it out with the tank on the gun. Works just fine. You should have seen the smile on my face followed by a  scowl. Thanks for all the help. I should have known it was the remote line I have had problems with it in the past. I guess it's time in invest in one of the straight stainless braided lines.