Really could use some help I have a 2007 ford expedition El and the rear air suspension isn't working. The other day while driving it raised way farther up than normal and was stuck after a couple of days in slowly started going down but not to normal height. Then went c9mpletely down and won't come back up. I have replaced the ride height sensors and nothing. When I first turn the key on and only after all doors are shut for a while I can hear the compressor kick on for about 45 seconds but doesn't raise it at all. Any help is appreciated.