Re: 98 EB expedition rear end wont stay raised when truck...
My truck is doing the same thing our air ride has a leak in it. we have found a mechanic that can put regular shocks on it thank god. its alot to replace them. more then i want to put into mine its a 98. over all i love my truck its just has alot of miles.
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The compressor should only run until the rear suspension reaches the desired height. If it continues to run after the suspension has raised to ride height then you may have a leaking air bag/solenoid or line. If you dont have any leaks it is possible the EVO(air suspension module} or relay is at fault.
I believe it has to b reset / retrained by dealer or mechanic who has ability to read what the vehicle is or isn't doing. If you don't hear the compressor running constantly, you most likely don't have a leak, basically it'll run long enough to level up the vehicle and you shouldn't hear it again. try and dissconnect the battery, for a minute or so try it again.
I have a 2001 Expedition, I don't have air bags in the front, the compressor don't work the air shocks. You have rear leveling. When they replaced the (compressor) did they turn the leveling switch back on. you may have air shocks connected to the compressor. Did the rear go down right after or over a couple of days. If the switch is on, turn it off and jack the rear up quiet a bit, make sure both side are quiet equal with each other, like it would be if it where raised by the air bags. Turn your level switch back on with it jacked up or sitting on stands. It may have went down so much that the compressor can't raise them back up.
I have owned several air suspension vehicles. My Expedition was similar to yours. You may want to try the 4x4 switch because it will raise the body 1-2 inches higher. Checking its fuse would not hurt.
On most of my vehicles the suspension would work end to end, raising the front first. You could have 2 issues with the suspension. There should be valving to switch the air to the rear suspension after the front is up. I would wait longer for the rear to catch up.
If I had to guess why the front lifts first it would be to get the front off of the curbs and sidewalks when you park so the bottom doesn't drag.
There is a diagnostic plug for the air suspension and sometimes Autozone or Oreillys have the scanner for that special plug. If not, some alignment shops and all dealers would have it. Also Ford parts are often the same as Lincoln and cheaper., Someone may make aftermarket parts at a better price.
Probably an air leak in one of the bags (£100 or so), should replace it
as your compressor will be working harder than it should be, and will
eventually also fail! Could also be the height sensor (£35) but that
is less likely.
I had a 1999 Expedition. When you put the 4x4 on it raises the vehicle an extra inch or 2.
It may help to turn the 4x4 off. Two wheel drive is a lower air setting.
Your original pump may still be good. The problem can be in the front. The compressor is not filling the front suspension to the cutoff point. It will lift the rear after the front end is at running height. Since you lost the front end first, the remaining air bled out there and then the rear came down. Once you shut down the car the suspension was done, all the air was let go.
There are adjustment solenoids on the body but you need someone qualified to repair this.
the hose is prob your air susp hose, it goes to the metal line on your rear end right above the drivers side rear wheel, or you can look for the air bag and track down the lines and where they go, sometimes they are in the middle and have a Y fitting