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Re: air suspension compressor run a lot. suspension
Hello. your air suspension is definitely leaking air somewhere. The only way to locate and repair the leak is to take it to a garage that does this type of work. Call a few local repair shops and get estimates. Regards, Joe
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Sounds like you need to check the air-bags for a leak. Unfortunately, the compressor may have wore itself out attempting to continuously provide air to the air-bag and may also need replacing. Just my $0.02 worth.
I will try to help you. There are just a few things that can be tried for free and sometimes a better Scanner can be hooked up to diagnose the suspension system. The Scanners vary by store among Autozone, Advance, and Oreilys autoparts.
The Relays in the Powerbox could be bad. Register your vehicle on Autozone.com and get free Fusebox layouts and wiring diagrams, which are color coded.
The rear cargo lid and all 4 doorjam switches must be closed in order for the airpump to work. There should be a Master dump(vent) solenoid inside the Drivers front fender ahead of the front tire. When this solenoid corrodes, it can stick in an open position and lock out the airpump.
Inversely, if stuck in the opposite position, it can keep the car raised up.
For the airlines and suspension bags a mix of soapy water in a spray bottle will detect an air leak when sprayed on the lines and suspension bags. This will produce bubbles. But the suspension does need to have air in it for this test to work.
When you do have pressure, remember that these are high pressure lines if you go to disconnect them and protect your eyes.
There are a few parts sites like Carparts or Car-parts.com which deliver Salvaged parts directly to your door via UPS or Fed-Ex. Price comparisions give you a choice of who to buy from and the site has full contact info.
You can get a clue from how the vehicle sits. If back is down or if one side is down, a partial inflation means the pump should still be good.
Problems with the air suspension seem to be less frequent with the Sport than in previous Range Rover models, but they still do occur. One owner reports "Whenever my RRS is lowered to "access" level a suspension system fault message apprears.". Another reports " Had the RRS back less than 2 hours and another "suspension fault." Also kept receiving messages that the vehicle is raising slowly and vehicle will raise when system cools. Couldn't even drive because it wouldn't raise out of access mode. Anyway, back to the dealer. Picked the RRS up again today-dealer said the EAS compressor was faulty and replaced it. So far everything is ok." Overall, most of the problems seem to be related to bad suspension height sensors or bad compressors. Angus Wade of the Czech Republic had his suspension light come on when in Germany; it started yellow and then red, then disappeared when he stopped and restarted the engine -- and has not happened since. His dealer said they have seen this a bit.
Weak Compressor: An official Technical Service Bulletin (TSB) LS-204-004 addresses "ELECTRONIC AIR SUSPENSION (EAS) WARNING MESSAGE AND LAMP ILLUMINATION". This deals with the warning message "Suspension Fault - Normal Height Only" message appearing with the Air Suspension Warning Lamp on. Computer diagnosis shows pressure increasing too slowly or unable to pressurize, with no air leaks. The usual problem is the compressor exhaust valve sticking, causing an internal air leak when the compressor is active. The bulletin recommends renewing the air compressor (RQG500090 is the latest specification air compressor with a stronger exhaust valve return spring)and installing and updating the air suspension control module software using WDS disc 13 or later.
Suspension Fault Message (random): One owner reported getting random suspension fault messages on his brand new RR Sport purchased in June 2006, well after the fix was in for the weak compressor. His suspension Fault message and Suspension Warning Light (Amber) came on after 5 days of ownership. He stopped and restarted the car, which caused the light and message to disappear, but they came on again after 5 minutes. Later the same day, the warnings disappeared again.
I have heard that on 2006 models, EAS fault messages can be caused by an internal leak in the Air Suspension compressor exhaust valve. The fix is said to be replacing the compressor updating the software.
In my opinion the air ride suspension is one of automobile's biggest mistakes. I see this a lot.
The first thing you must do is isolate the problem.
Jack up the back of the car and remove the rear wheels.
Now your shocks are visible. Inspect the rubber boots in the midsection of the shock, If this is worn or torn they will need to be replaced as they dry out once the integrity of the boot is jeopardized.
Next turn the key forward to turn in the compressor that you hear. And follow the thin black air lines that run into the side of the shock. A lot of times, especially on a vehicle this age, these lines will at some point rub on the frame or other item and have holes. Just listening for air leaks and running your fingers along the lines (feeling for bumps or holes) will give you a quick answer on this.
The only thing left in the system is the compressor itself, just remove the air lines from the shocks and as the compressor runs feel the end for air pressure. If you feel it the compressor is working.
Once you have isolated the issue your vehicle faces, feel free to come back and ask for assistance in replacing them. Be thourough and check everything though because 1 bad element will make future problems inevitable.
Please feel free to rate my answer and come on back to FixYa anytime.
your bags may need replaced in the rear
i have seen this many times with several different solutions to the problem
more times i have seen the air ride bags blow out-which the compressor will stil work but with holes in the bags they will not air up
sometimes i have seen the valve go bad which i believe is located on the rear diff
Sounds like the problem is in the air bag suspension, not the compressor. The air bags shouldn't be losing air when the car sits. The compressor adjusts the suspension level according to the load. The air bags have a valve similar to a blow up raft that allows air to pass through both ways. If when the car is running the compressor is constantly running and not turning off, the issue is within the air bags and/or the air line.
What is probably going on is the air suspension has a leak so the compressor is breaking down. So it will run at odd times trying to make up for the times it can not run. What you need to do is look for a conversion kit. The conversion will stop all problems that you are having now and you will never have to worry about it again. I would recommend strutmasters.com. They have great prices and there kits are guaranteed to last the life of the car. I posted the link below so you can take a look.