Rear Air Suspension Trouble

Discussion in 'Suspension' started by Peter Mensonides, Oct 5, 2018.

  1. Peter Mensonides

    Peter Mensonides New Member

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    I'm having an issue on my 2007 Expedition EL, with the rear air suspension not working. The rear end is completely lowered and will not come back up. I've verified that the air suspension compressor does turn on, but the suspension bags are not inflating (I assume so, because the rear remains completely lowered). I disconnected the airline/port directly at the compressor/dryer to try and determine if air is indeed coming out of the compressor. With that line removed from the port, should I expect to feel a strong air push out of the compressor, like what you get from a portable air compressor hose? Because it's more like a "trickle" of air.
     
  2. 1955moose

    1955moose Full Access Members

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    The air pressure is small due to the line size and the small compressor size. Nine times out of ten it's the air bags or airsprings the proper name that rot out and leak. They last about 8-11 years depending on usage and if they dry out. Most customer's don't know that spraying down the bags with silicone or rubber spray lengthens their life. You can replace the bags or swap in coil springs all 4 corners.

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  3. Peter Mensonides

    Peter Mensonides New Member

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    Thanks for the reply, 1955moose. Neither rear airpsring is filling; isn't it unlikely that both airsprings would suddenly stop filling at the same exact time?
     
  4. 1955moose

    1955moose Full Access Members

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    Very common. If in doubt have someone check it out for you. Suspension inspections are usually free or low cost. When my 84 Lincoln front bags went out, both sides dropped. At first it would pump up by flipping off switch in trunk, then flipping it back on. You might try that with yours. Switch should be in hatch area, check owners book for location.

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  5. Peter Mensonides

    Peter Mensonides New Member

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    You've been a huge help, 1955moose. Thank you! I'll try the flipping the switch and let you know what happens.
     

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