Question about 2000 Ford Expedition

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I head a pop and hiss noise while at a fast food drive in and now there is no rear suspension... What is wrog suspect air line would that be correct ?

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The Shocks are Pressurized gas which leaks out very fast if the seal or hose is broken. I would suspect that the shock has leaked out and needs to be replaced.. The air bladders could also be broken if they are strictly air suspension. Usually air suspension is only an assist and never collapses even when all the air is gone. This could be after market full air suspension. Hope this helps

Posted on Jul 03, 2009

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1 Answer

Clunking noise in rear end when reversing then going forward


The rear suspension has no drive parts as your car is a FWD, front wheel drive. There are parts on the wheel axles which have bearings and also Brakes.
If you have rear disc brakes, the inner part of the rotor has a drum for Emergency brakes and these linings often peel off their brake shoe. The loose lining can get ground up in the turning rotor hub. The Emergency brakes are pinned to the brake backing plate and can clunk when the shoes shift. If you have rear drum brakes the shoes may be out of adjustment or worn out leaving room to rock as vehicle direction changes.
Bearings, excess play can cause noise. Suspension brackets, bushings within the mounts for these components can wear out. When parts are moving in 1 direction a "set" is grooved into the rubber parts. Changing direction of travel will unseat the part and make noise.
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This is simple the air suspension air bags are leaking, they last about 75-100,00 miles on this model, even less if driven on harsh roads or off road.

Oct 29, 2012 | 2008 Ford Expedition El

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I have a 1999 Buick century and their is a hissing noise coming from the rear pasanger side it sounds like a air leak from something but I'm stumped to what it could be. It does it all the time as long...


You can have an exhaust tailpipe leak or a muffler leak when the noise is farther to the rear of the car. You can have a leaking rear suspension bag if you have adjustable rear suspension.

For the suspension problem, you will be able to use a spray of soapy water to see if a line or suspension bag is leaking. Or some of the better scanners can be attached to your car and the suspension access plug will tell the condition of the system.

Jul 03, 2012 | Cars & Trucks

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What's your problem?Toyota Prado Grande 2004. Hissing sound at the rear air suspension and it drops (the body). Does not happen all the time. Bounces a lot quite often noticibly on a hot day, does


If you have Air suspension this can happen. The noise you hear like from an engine is actually the airpump trying to keep up.

The hissing is air escaping and the bouncing is an indication that the suspension is not fully inflated.

There are individual bleed valves so the system can be leveled by itself. The valve on one suspension unit may be leaking. Sometimes soapy water sprayed while the part is working and again while shut off will show a leak.

Some Makes have a diagnostic plug which a scanner can read to find the problem. Often a car is jacked or lifted on a rack and someone did not turn off the Air system and knocked it out of alignment.

I hope my solution is helpful and enables you to diagnose the problem now.

Jun 06, 2012 | Toyota Cars & Trucks

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My car doors and truck want open with the push of the button from the key ring. The worst is that after I reach 45 mph my car starts choking and shaking. I have to speed up to 50mph to stop it from...


I had a similar problem, when i would press the gas pedal down X%, the car would shake, and kinda do a "Pop pop pop pop pop" noise.. (NOT a backfire, like a light popping noise), ended up being a tiny air leak in a hose.. Fixed that.. 6 mo. later, a gasket in the throttle body had sprung a leak (Leak of air pressure), and the car is doing this again.. feels like its gonna stall, and does it when i accelerate fast, or go over 60.. This is all because jaguar uses digital gas pedals (VS "Drive by wire"). if this is it, its a easy, cheap fix.
Just start the car, and put your ear towards the engine (With the hood up.. watching out for moving parts), listen for a hissing noise.. Your car should not hiss at all.

Oct 31, 2010 | Jaguar S-Type Cars & Trucks

1 Answer

Air suspension light was on then there was a loud noise like something heavy had dropped in the trunk so I stopped and noticed that the rear of the body was sitting down on the back wheels


You will find that the rear air suspension hose has failed. To check, wieh the car running listen for a loud hiss. That is where the leak is. Take it to a dealer you pay $200 plus. Fix it yourself,fifty cents.

Chanses are the leak willbe at the drvers side rear connector to the shock. hope that helps

ash

vote please

Sep 26, 2010 | 1999 Lincoln Town Car

2 Answers

After I turn off my car, there is a loud sound like a motor running under the car. Is this from the compressor for the air suspension? I also get a roaring noise when I am driving that comes from the rear...


Then noise you hear after shutting off the car very well might be the air suspension compressor. The air ride system is still activated for a half hour after the vehicle has been shut off. The roaring noise from the rear could be a bad bearing. The rear axle seals don't always leak when a bearing goes out. So it's not a conclusive indication that they are good just because the seals aren't leaking. If your mechanic isn't too versed in differentials it may be advisable to seek an opinion of a reputable transmission shop (however, that may be a difficult task).

Sep 12, 2010 | 2003 Lincoln Town Car

1 Answer

Rear suspension fell


it most likely blew a line going to the rear leveling valve to leval out the truck i would start there and then check the bags and the valve it self.

Aug 01, 2009 | 2001 Lincoln Navigator

1 Answer

EXPEDITION REAR AIR RIDE PROBLEM


do you have just rear air suspension? here's rear only. 4 wheel different. Deler an run a diagnostic test with WDS machine and get fault codes.
-------------------------------------------------------------------------------------
The air suspension system is designed to improve ride, handling and general vehicle performance for static, on-road and off-road driving conditions:
  • Ride is improved by using an air type spring (the soft ride is inherent).
  • Handling is improved by maintaining constant vehicle attitude.
The system consists of unique rear air springs, the air compressor, air lines, air spring solenoids, height sensor, air suspension control module, attachments and associated signals derived from both driver and road inputs. With these components and signals, the air suspension control module commands changes in vehicle height that are necessary for the load leveling features.
The load leveling feature rear air suspension (RAS) systems shall automatically make adjustments in vehicle height so that the vehicle is always at trim height and constant front-to-rear vehicle attitudes are maintained over the expected load range of the vehicle. Adjustments in height that are necessary to correct height differences between the vehicle's left and right sides for the RAS system shall be restricted to what can be reliably achieved with one air suspension height sensor.
The system uses one air suspension height sensor, a steering sensor, generic electronic module (GEM) and other vehicle sensors to measure driver and road inputs. The system changes vehicle height using an air compressor, two air lines and the use of air springs with air spring solenoids.
The air suspension system holds vehicle height when the rear hatch or any door is opened. The system stores rear vehicle height the moment any open door is detected. The system then maintains this height regardless of the addition or removal of a load. The system will return to its commanded height when all doors are closed or the vehicle speed exceeds 16 km/h (10 mph).
----------------------------------------------------------------------------------------
Air Suspension Height Sensor
One air suspension height sensor is mounted on the vehicle. The air suspension height sensor sends a voltage signal to the air suspension control module. The output ranges from approximately 4.75 volts at minimum height (when the vehicle is low or in full jounce), to 0.25 volts at maximum height (when the vehicle is high or in full rebound). The air suspension height sensor has a useable range of 80 mm (3.2 in) compared to total suspension travel of 200-250 mm (8 to 10 in) at the wheel. Therefore, the air suspension height sensor is mounted to the suspension at a point where full rear suspension travel at the wheel is relative to 80 mm (3.2 in) of travel at the air suspension height sensor. The air suspension height sensor is attached between the No. 5 frame crossmember (upper socket) and the panhard rod (lower socket).
When the air suspension height sensor indicates that the rear of the vehicle is lower than trim under normal driving conditions, the air compressor will turn on and pump compressed air to the air springs. When the sensor indicates that the rear of the vehicle is raised above trim under normal driving conditions, this will cause the air to be vented from the air springs to lower the vehicle back to its trim height level
------------------------------------------------------------------------------
  • Uneven vehicle height
  • Circuitry.
  • Rear pneumatic fault.
  • Air compressor assembly.
  • Air suspension control module.
  • Go To Pinpoint Test I .

Feb 21, 2009 | 2001 Ford Expedition

2 Answers

Rear air suspension problem 1995 lincoln town car


first of all there is no air suspension in the front does the compressor come on? If it does check for a hissing noise in rear, the air bads have a tendency to dry rot and split

Nov 21, 2008 | 1995 Lincoln Town Car

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