alltradeWhen you're using the impact gun, what's the air compressor's PSI?
My guess is that air is leaking from your compressor. Make sure everything is sealed and tightened correctly.
Idunno. Every tool I have tried on mine does not work. Hvlp guns, impacts, grinders, and wrenches. They just make a bunch of noise and generally suck. Then again I have never bought any nice tools for it. Too discouraged by everything else not working my compressor is just a nice tire pump now. I mean I even Tried using it to just blow water out of screens and it's still worthless. After having bought mine I was instructed by more knowledgable friends that the tank is everything. I think there is a reason why most people who use air tools regularly have tanks that are huge.