98 Navigator Air Suspension

[rbs]

I have recentley replaced the air compressor and the 2 rear air springs. The check suspension light comes on sometimes after 10 minutes or it may last 1 hour then it will come on. Is there an adjustment that I should have made to make sure the ride height is level. I have also noticed that the back of the vehicle measures about 2 inches higher than the front measuring at the front and the back of the running boards. Is it possible that the height sensors are reading 2 height levels and sending an error to the computer? If there is an adjustment that I can make to remedy this problem I would appreciate the help.
Thanks

[Air Suspension]

How many miles on the navigator? If 80 to 90+ you my need front air shock if they are leaking the compressor will pump and then time out. There is no adjustment you need to do. Unless you moved the height sensor brackets.