I have just recently run into a problem with my Paasche LV air brush having a cyclic sputtering problem. The paint passages are all clear and clean and I have even changed the nozzle, tip, and needle. All the paint passages are in good shape but it continues to shoot, choke, shoot, choke in a cycle. The more trigger you give it the faster it will cycle. I pulled a bunch of garbage out of it the first time it came apart and have gone through it completely about 10 times, tore it down to just the body and rebuilt it over and over but the problem continues. It seems like an internal air passage problem within the body of the gun. Any ideas ????