Gary, Got it! I know that on my 06 PT if the air leak is in the rear on one side or the other it will make the whole coach lean. The front and rear are separate systems with their own manifolds. You have air leaks somewhere on that side of the coach, spray bottle with dish soap is about the only way to find the little buggers. I was amazed at just how small a leak will cause the coach to lean.
Make sure if you are getting under the coach with the system aired up that you block it up. I made 4"x6" blocks that go between and the upper frame and the subframe in the rear and front to make sure it can not come down. Not so much worried with the front, with the generator all the way out there is enough room under it. I'm skinny enough that I can get in and out from under with the coach all the way down.
Like I said before most of my leaks have been with the Nason air pressure switches, they have a set screw in the side and if they are leaking that's where the air will come out, also the push to connect air fittings.
The Nason switch can be rebuilt, remove the set screw and the solenoid will screw off (held together with silicone). Clean and re-assemble, I've done a couple.