Rear suspension fell

Did you check the compressor relay ? Location BJB - battery junction box , under hood fuse relay box . plus fuse #19 60 amp .this powers the compressor . If the fuse an relay or good Have a repair shop check for DTC'S - diagnostic trouble codes in the VDM - vehicle dynamics module . This module controls the air suspension . Do you know anything about automotive electronics an computers . (modules)

16 costly car noises - Bankrate.com

www.bankrate.com/finance/money.../16-costly-car-noises-1.asp...

BankrateYou should not ignore certain thumping, banging, clicking and squealing sounds. These sounds often rear their heads or intensify whenever the driver takes ... Hissing or sizzling under the hood: Heard when the engine is first shut off, .... my rear right wheel makes a loud bang when switching from park to drive/reverse.

Sounds coming from drivers side front wheel - AnandTech Forums

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AnandTech
Dec 1, 2009 - 21 posts - ‎10 authors
Sounds coming from drivers side front wheel The Garage. ... slightly left, I get a slight metalish-squealing sound coming from the drivers side front wheel area. ... but before I start the wild and expensive goose chase of bringing it to mechanics I ..... Those twoloud clunks when turning hard right give it away.

Ford Explorer Questions - Thumping from front end - CarGurus

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CarGurusDec 22, 2009 - Thumping from front end - I have a hard thumping noise coming from ... without problem then I'll take a turn or something and it will start. ... I just recentlystarted having a rubbing and thumping and squeaking noise in the right front sidewhen driving ... Thumping sound coming from under the truck 4 answers.

Car Noises: Consumer Reports - Consumer Reports Online

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Ford Air Ride Rear Suspension Down Diagnosis & Fix ...

? 9:57
https://www.youtube.com/watch?v=wfh7n17hvN8
Feb 24, 2014 - Uploaded by FordTechMakuloco
Ford Air Ride Rear Suspension Down Diagnosis & Fix ... why theair ride compressor is not turning on and pumping up the air ridesuspension on your truck. ... Ford Expedition & Lincoln Navigator Air Ride C1725 Common Faults ... 2000 Ford Expedition - Replacing the rear shocks with load leveling shocks ...

2003 Lincoln Navigator air suspension fix(3) - YouTube

? 3:41
https://www.youtube.com/watch?v=MhWlcYycny4

Try to better describe the noise.
Is it a
scraping of metal
grinding / rubbing
high pitched shriek like a drive belt slipping
Is it
underneath the body
under the hood
in the aircon
when you pull into gear
when you pull away
etc
Do a bit of detective work and come back.

could just be a seal on the air line itself, or possibly a whole in the line or one of th eleveling air bags. gong thru the water should'nt have any effect on it,unfortunately these are just like any other part, or seal they just eventually wear out.

It sounds like one of your air bags could have blown. I would check them first. I would also suggest checking into a replacement non air conversion kit from Strutmasters. I replaced the air system on my 2002 Navigator and saved a lot of time, money and headaches.The lines on my navigator had holes in them and I replaced the compressor twice before I realized it. Very costly. Avoid all the hassle and check out Strutmasters.

If your not too familiar with air-suspension, send it in. But I can tell you that the air-compressor will not last too much longer if it runs constantly.
You need to go underneath and find out where the air is coming from while the compressor is running. It is possibly coming from a defective proportioning valve, bad air-line or defective air-bag.

yes, why is sensor not moving , did it unhook ,if so hook it back up, also the air back might have a hole, start engine and listen for an air leak at left rear, if hissing noise is heard then spary bag to see if leak is on bag if so replace suspention bag hope this helps good luck,

Remove battery, remove windshield washer bottle, remove air compressor and disconnect both air lines from the compressor dryer. Make sure compressor electrical wiring is plugged in, install battery, turn suspension switch to ON, turn ignition switch to the ON position, close all door and the compressor should come on and completely lower the whole truck. Once the truck is completely down, turn the ignition OFF, remove battery and connect both air lines. Install battery ensure electrical wiring is plugged in, turn ignition switch to ON, the compressor should come on and raise the vehicle to the correct ride height.

loud hiss sounds like a air line broke or 1 of the bags somehow got a hole in it

crawl under and follow the lines and look for damage maybe turn the key on so that the compressor is running and listen for leaks