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Re: 1998 cadillac seville sts
Maybe there is a leak in the system and the pump is constantly trying to compensate. if the vehicle sits for a day or so, will the suspension sag in a certain spot? maybe a leveling sensor. may have to be diagnosed with scan tool
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Your vehicle is apparently equipped with Automatic Level Control Suspension (ALC). The thing you hear running in the rear driver's side is the air compressor that pumps up your air suspension. It is normal for this to run occasionally. Sometimes they seem a little loud. That's why they mounted it all the way in the rear and used rubber bushings to secure it...so you won't hear it running while you are driving. If it is running too much, it can be a sign that your air suspension components have air leaks. If it seems to run constantly, you need to get your suspension system checked because the pump will burn itself up trying to keep the leaky suspension inflated. VERY common as well as VERY EXPENSIVE to fix if not taken care of promptly.
If it just runs for a minute or two and shuts off and doesn't come back on for a long time, don't worry about it - this is normal. It SHOULD run for a while if you have the ignition key turned on and you load something heavy in the back of the vehicle.
Use a test light to the air suspension pump to see if it is getting current. I assume that the rear end is sagging a bit as far as ride height, due to the pump not working. Also, may try to remove and replace pump, assuming that's the problem, and then when the rear air shocks pump up, make sure there are no leaks after shutting down the vehicle.
Also, make sure that the shut off switch for the suspension isn't flipped to 'off.'
Your vehicle is equiped with a small compressor that pumps air into either a bag or shock absorber, each one has a leveling mechanism that sends the signal to pump more air to that particular side. This keeps your vehicle leveled at all times, like when you have passangers in the back sit, passenger sit, or luggage.
The message you are getting means that either the air is not getting to the front passenger suspension to level it up, which could be due to an air leak, or the bag or the part of the suspension that lifts that part of the vehicle is defective.
You can get a diagnostic at any reputable suspension shop at no charge to find out the exact cause.
At the rear of the vehicle there are switches. If you look underneath you will see arms coming off them as they move away from the suspension they activate the pump. When the vehicle is level the arms contact and shut the pump down.
hi,i own a bmw 750i,and went over a hump back bridge to fast and left the ground a bit.since then the rear suspension is jacked right up high permanently and makes a screeching sound like gas is escaping...any ideas??
there are two options replace the airbags with new airbags
or replace with crown vic coil springs.
I recently bought new air bags from ebay brand new for like 230 for set
these were from arnott suspension and were very nice quality lifetime warranty
if you look on ebay you will see the conversion kit for coil springs also