1992 towncar the rear of the car sits much higher

I would recommend going to strutmasters.com and taking a look at our conversion kits. these convert you from the airbag to a powder coated American made steel coil spring that is guaranteed to last the life of the car. Airbags and compressors are constantly having to be replaced. Also something alot of people don't know is that theses air suspensions are not meant to be in temperatures above 90 Degrees or below 40 Degrees. That is most of the world. The temperature will cause you to replace alot of bags. and typically when your replacing a bag you are going to have to replace the compressor to because the bag had a hole or small crack in it causing the compressor to over work and it will die. I posted the link below so you can take a look

http://www.strutmasters.com/lincoln-suspension-parts-s/1.htm

I hope I was of some help

Good Luck!!!

The air suspension controls the height of the car, First check if its turned on by opening up the boot/trunk and make sure this switch is turned to on.

If that is on do you have any light on the dash that says "CHECK AIRSUSPENSION" If that is the case its detecting a problem with the system and it wont do any venting/filling.

If the air suspension is pumping etc and operating like it should be you may have a problem with the Height sensor.

If you dont have Air Suspension no more your car has been converted to coils and they would bring the rear higher than the front.