Technical - Common problems with air suspension
First of all, airsprings DO NOT LEAK. Look elsewhere. The leak will be at a fitting.
Spray soapy water on all connections and look for bubbles.
Don't forget about the control panel or digital pressure sending units
Low air pressure, too soft shocks, poor shock placement could be a cause.
Increase the air pressure, install a stiffer shock, or find a more effective location for the shock
Poor Ride Quality
Typically the cause of a harsh ride is low air pressure which leads to an airspring height that is too low.
This forces the airspring to operate in a range that is not optimum for best ride quality.
Every airspring has an intended ride height. Achieving that ride height is the goal.
Poor ride quality can also be caused by damaged or improper shocks, or by too little suspension travel.
There really needs to be a minimum of 3 inches of compression travel at the wheel to allow a decent ride quality.
Most cars are heavier on one side, usually due to a driver.
Cars without swaybars and tall, heavy cars such as a sedan delivery are most susceptible to leaning problems.
The fix is simply to use a 4 way control system that offers independent control over each airspring.
Then you can increase the air pressure to the appropriate airspring to level the car.
We have seen some cars require as much as 20 psi difference from one side to the other.