I just got a Blue Hawk air compressor and nail gun combo. I have added oil, I'm using 18 ga 5/8" nails and when I press the trigger a dent shoots into the wood but no nails. I called support and they were unable to help me. Any ideas? Is it just defective?
Check the pressure
Check the recommended pressure range listed on the gun, and make sure the compressor is putting out a pressure within that range. I've seen similar symptoms when the pressure was too low. Presumably the hammer didn't have enough energy to move the nail, so it skipped over it instead.
Properly load the nails
If the nails are not properly loaded, they may not be fed into the line of the hammer. You'll end up just firing the hammer into the wood, instead of a nail.
Engage the feeder
Make sure the nail feeding mechanism is in place. If it's not, the nails will not be fed into the line of the hammer. This again will lead to you firing the hammer, instead of a nail.
Insure that the nails are compatible with the gun. If they're not, the gun may not fire, misfire, or self destruct.
I'm not familiar with that specific gun, but it sounds like the spring that pushes the nails into the "chamber" isn't working. Either it's broken/defective, or the gun somehow allows you to put the nails in wrong (which seems unlikely).
Take it back and see what the next one does.
I just had the same issue. I checked the pressure, and knew the nails were compatible and what seemed to be properly loaded. Looking closely into where the nails feed, I noticed a nail was jammed up right at the top inside the feeder. I was able to open the top of the nail feeder and remove the jammed nail. Now the gun works properly again! This may be your issue. If not continue troubleshooting with above suggestions. Make sure to note if it is an oil free finish nail gun as I have a newer Rigid model that is oil free.