* Air Line Leaks: This is the most common problem. Leaks can be anywhere in the system: at the connections (often fittings or valves), within the air lines themselves (due to age and cracking), or even at the air suspension struts themselves. A small leak can prevent the system from properly releasing air, causing it to remain inflated.
* Air Compressor Issues (Less Likely but Possible): While not directly preventing air *release*, a faulty compressor might be contributing to the problem indirectly. If the compressor is struggling or failing, it might not be able to properly equalize pressure, hindering the release of air.
* Valve Problems (Height Control Valve): The height control valve manages the air pressure in the system. A malfunctioning valve can prevent the system from venting properly, trapping air in the suspension. This is less likely than a leak.
* Air Suspension Struts/Bags: A severely damaged air strut or bag might prevent proper deflation, but usually this manifests as a complete inability to hold air rather than just a problem with releasing it. A partially clogged air passage *within* the strut is less common but possible.
* Wiring/Electrical Issues (Relays, etc.): The air suspension system uses electrical components to control the air compressor and valves. Issues with wiring, relays, or the control module can disrupt the normal operation of the system, potentially affecting air release.
Troubleshooting Steps:
1. Visual Inspection: Carefully examine all air lines and connections for cracks, leaks, or loose fittings. Listen for hissing sounds when attempting to release air.
2. Check Air Compressor Function: Make sure the compressor is running and cycling correctly when you attempt to lower the car.
3. Test for Leaks: Use soapy water to check for leaks along the air lines. Bubbles will indicate a leak.
Since this is an older car, age and wear and tear are significant factors. Leaking air lines are the most probable culprit. Finding and fixing the leak(s) is the most effective solution. If you're not comfortable working on this system yourself, take it to a qualified mechanic familiar with air suspension systems.
