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Hi Bill,
I have a 1996 Town Car. The problem is that when I shut off the car the rear suspension lowers about 1-2 inches and holds till the next time I start the car. After starting the air pump starts and brings the car back up the same 1-2 inches and holds. Everything in the air suspension seems to work fine, no warning lights, no leaks, no codes.. When the car has a load the suspension works properly.. Any Ideas?
Sincerely,
Russell
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Greetings Russell –
If you are diagnosing correctly as per the manual with no success, some of these air spring leaks can be difficult and tricky to locate. One possibility is that the air springs have developed some very fine cracks that leak down somewhat, lower the rear suspension and then seal up tight when the vehicle lowers. This may be seen with a very close careful inspection with the car on a frame lift and the switch turned off inside the trunk. With this inspection the rubber bags will be stretched and small cracks will become visible. If this is so, these tiny leaks will worsen and over work the pump to a point of failure. Vehicles of this vintage that have not had new bags installed are usually overdue at this time. Good luck with a speedy diagnoses. We do have quality replacement bags available if needed.
Sincerely,
Bill