[sdawg]

Do you hear any leaking or clicking from anywhere?

Do you have a gauge? What is the needle doing? What's your pressure at?

Are you using a fresh battery?

Does your tank have air?

is the bolt pin connecting the hammer and bolt correctly?

If you messed with the internal hoses, is the middle hose bend or pinched too sharply?

You might try pressing the red button on the back of the solenoid (with marker aired up and turned on), which will fire the gun and can clear out any debris (e.g., teflon tape) that may have found its way into the hoses/solenoid.