2003 Limited Rear Air Suspension Help

My 2003 Limited (with about 150,000 miles on her) has the Rear Air Spring system and it is starting to act weird.

If I set the Air ride system to HIGH and I park the car, overnight it seems to hold the air and I return to a car with its butt high in the air. However if I park the car with the Air ride system set to NORMAL.. overnight it seems to loose pressure and the next day I have a sagging butt, and the ride is crazy bouncy.

I have jacked up the car with the system set to both high and normal and using soapy water in a spray bottle, no leak can be seen on the bags, lines, connectors or the "tank" thing.

No codes.

Anyone have any ideas? I would like to keep the air ride system if possible.

 

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