Originally Posted by Kris D
Not sure if this is the answer but most paint guns you can pull the trigger about halfway and just air will come out. Usually used to set air pressure. Might be what your feeling? I know on my SATA 3000 HVLP when you pull the trigger halfway it pushes your hand back a little.
no this was like a shake on the air cap. And it only happened one the first pull after it will not do it.