Re: 2004 Air ride problems/ intermittant hissing noise front right
Sitting for a few days is nothing. Most air suspensions don't last more then 24hrs outside of some HD vehicles depending on tank capacity. In fact, 3 days without significant loss of pressure is excellent.
The best way to find a leak on an air system is to get an empty spray bottle and fill it 1/3 up with dish soap, preferably red in colour - do not dilute it. Start the vehicle up, crank the wheel over so you can see the air bag/air line or find a safe alternative way to get under the vehicle. As you have the area narrowed down to where the leak might be located, locate the air lines from the compressor. Then, take your soap bottle and spray down the air line connections. You will know where the leak is when you see the soap bubbling. Before you drive away it's best to rinse the soap area off with hot water, but to each their own.
This is how I diagnose air leaks on motor coaches that have many air lines for brakes, suspension, and accessories. Worst case is an air bag has a small hole in it, as it's one of the more expensive parts to replace outside of the compressor itself.
'00 Durango R/T 360ci 290hp (modded); 138,500m
'06 Pontiac G6 GT 3.5L 220hp; 44,000m
'12 Chrysler 200 Limited 3.6L 283hp; 13,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!