What brand air bags are these? My Air Lift bags require a min. of 10 psi at all times. Others are 5 psi apparently.
My set up has a built in pressure switch that will turn on the compressor anytime the pressure drops below 10 psi. This ensures I always have the minimum in there.
The trick with air bags is to add the minimum amount of air necessary to support the load and stabilize the vehicle. Too much air and lots of bounce and sway will occur. Too little and the suspension may bottom out on bumps. On my truck 25 psi will support the load fine but on bumps it bottoms out. I have to run 40 psi to prevent bottoming out but then it sways more than at 25 psi.