It seemed to go crazy for a while pumping up the back end then the front and now it's completely down on back and front. We used to hear the motor run just turning on the key switch but now it doesn't work. Where do I start after the fuse, 50Amp in not blown?
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do you hear the pump running from under the back of the car? check
fuses? is the suspension light on in
the dash? this system is diagnosable with the right tester.have someone get the fault code from the suspension module. could be as
easy as a sensor. was the car towed recently? flat beds ofter knock off
the sensors when car gets tied down. my air suspension went out on me. And the dealers price was too
expensive and i went to Strutmasters.com and bought a conversion kit
that eliminated the air and has a lifetime warranty so now i don't have
to worry about it ever again. Prior to jacking or lifting a vehicle with air suspension, you must turn off the suspension switch. find the reset switch auto parts store will tell you where its at
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.
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 air suspension uses the same vent solenoid to vent front so that will be ok. The problem will either be the rear height sensor which mounts on/near left side of rear axle. Or the air suspension module itself.
I would suspect it is the rear height sensor,the link may have come unhooked or it may be sticking or just bad.
Experienced problem after problem with my suspension on my 1990 LSC. Finally contacted "Strut Masters" online and replaced my entire system with a conversion for less than 400 and an afternoon. Installation was simple.