I have installed 3 Firestone air bag systems. They all have had initial installation leaks. I have just removed the tube from the connectors, re-cut the tube reinsert, check for leak move on down the road. My last rig had the airbags on it for 6 years and it would loose a few pounds of air over a few months, but not enough to be an issue. Removing and reinserting into original connectors is no problem. Cut, reinsert until there are no more bubbles.
2009 Sunseeker 2860DS
Bulldog keyless entry
Airlift remote compressor system
Ultragauge EM Plus OBDII monitor