The air ride suspension on a Mercury Grand Marquis gives the vehicle a remarkably smooth ride. Standard shocks are enhanced with air bags, similar to the style used in large tractor trailers. The system is controlled by a computer, which turns an air compressor on and off to maximize rider comfort. However, as age and wear set in, every component in an air ride system is susceptible to failure. When this happens, you might just wish you never owned the car, as air ride repairs can be some of the most expensive repairs you can make to your Mercury.
Things You'll Need
- Spray bottle with soapy water inside
Use the flashlight to examine the air shocks in the front and rear. The shocks are equipped with a ride height indicator. In very rare cases, this indicator can be damaged, giving the air ride system a false sense of the proper ride height. If any of your indicators are bent, missing or otherwise misaligned, have that corrected before continuing your troubleshooting efforts.
Start the car and listen for the air ride compressor to kick on. If the compressor does not turn on, check the fuse and replace it if necessary. If the fuse is not blown, you will need to replace your compressor. If the compressor seems to run fine, but cycles often, you need to inspect the system for a leak.
Lift the hood and locate the air compressor. With the engine running, spray the soapy water on the connections where the air ride lines go into the compressor. If you see any excess bubbling, you have a leak. If you do not find a leak at the connections, follow each line to its end, spraying each line as you go, continuing to look for bubbles that will indicate a leak.
Spray the air bags and air struts at each corner of the vehicle while continuing to look for a leak. Once you find your leak, replace that component. When replacing air bags or struts, it is always best to replace them in pairs. So, if the right front strut is bad, replace both front struts. If the left rear air bag is leaking, replace both rear air bags.
Tips & Warnings
- Once a leak occurs in a line or air bag, it is commonplace for another to occur after the first one is repaired unless all the old lines and air chambers are replaced. Keep this in mind when you dig into air ride troubles, and be prepared to replace the entire system if necessary.
- Photo Credit Jupiterimages/Comstock/Getty Images
How to Troubleshoot an Air Suspension Check Valve
If an air suspension system "bleeds down" after several days of no use, it may leave a car equipped with air suspension...
How to Troubleshoot Air Suspension
Air suspensions have been in use for decades now, and not just in semis and Cadillacs. More recently, custom car builders have...
How to Replace the Ball Joint on a Mercury Grand Marquis
The Mercury Grand Marquis is one of the last full-size, rear-wheel drive cars on the market. The Grand Marquis shares chassis components...
How to Change a Shock on a 2000 Mercury Grand Marquis
Shock absorbers are designed to keep the wheels on the 2000 Mercury Grand Marquis in contact with the road. Shocks are filled...
Mercury Grand Marquis Alternator Troubleshooting
The Mercury Grand Marquis is a heavy, full-sized, V-8 sedan that seats six passengers. Though the Marquis lacks many of the features...
How to Add Horsepower to a Grand Marquis
Ford designed and produced the Grand Marquis, a full-sized sedan sold under the Mercury badge, which was typically for luxury-trim levels of...
How to Charge a 1996 Grand Marquis Air Conditioner
The 1996 Grand Marquis is a full-sized sedan manufactured by the Ford Motor Company and sold under the Lincoln-Mercury name brand. The...
How to Fix Overheating in a 1997 Mercury Grand Marquis
If your 1997 Mercury Grand Marquis is overheating, then a variety of problems could be contributing to the excessive heat buildup in...
How to Diagnose Bad Air Shocks
Air suspensions do not actually use air shock absorbers, these systems use large air bladders in place of metal coil springs to...
How to Clean a Jetta IACV
The Volkswagen Jetta idle air control valve should be replaced when it malfunctions, but in a pinch, you can try cleaning it....
Problems With the Mercury Transmission Solenoid
The transmission solenoid controls the flow of transmission fluid throughout the transmission of a Mercury automobile. Many technical service bulletins (TSB) and...