Air Ride Suspension

[Stickerhead]

My air ride suspension compressor comes on and runs for a few seconds with the truck off randomly. Is that normal or does it have a leak? Suspension works fine in all modes. Jus don’t want a dead battery


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[clazer]

Take a quick look at your manual, it’s normal

 

[Stickerhead]

Guess I could have but I am lazy and can type from my bed.
Thanks


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[19TXLimited]

Guess I could have but I am lazy and can type from my bed.
Thanks


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I'm with you, but I believe it was talked about in another thread...I'm not of much help as I can't remember what everyone came up with as the answer.

I believe it has to do with the truck allowing the suspension to decompress when parked for extended periods...then when truck is unlocked the suspension airs back up to level...don't quote me here, but seems like what my truck is doing when I notice the compressor popping on and off.

 

[Edwards]

I'm with you, but I believe it was talked about in another thread...I'm not of much help as I can't remember what everyone came up with as the answer.

I believe it has to do with the truck allowing the suspension to decompress when parked for extended periods...then when truck is unlocked the suspension airs back up to level...don't quote me here, but seems like what my truck is doing when I notice the compressor popping on and off.

Just like your tires drop pressure overnight (not as hot when not working and even in Death Valley it cools overnight) so will your air suspension. Between that and changes in load (even a 12 pack can trigger it) it's trying to maintain the appropriate height and rake.

 

[Stickerhead]

Well if it is indeed Nitrogen charged, it should not change pressure due to temp change. Maybe something else?


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[cra1g]

Well if it is indeed Nitrogen charged, it should not change pressure due to temp change. Maybe something else?


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ALL gases, nitrogen included, change pressure due to temperature change (assuming constant volume).

My Grand Cherokee with air suspension has occasionally run the pump to adjust since day 1 (it's 6 years old), and it hasn't caused any problems. My Ram does it, too. Nothing to worry about.

 

[Edwards]

ALL gases, nitrogen included, change pressure due to temperature change (assuming constant volume).

My Grand Cherokee with air suspension has occasionally run the pump to adjust since day 1 (it's 6 years old), and it hasn't caused any problems. My Ram does it, too. Nothing to worry about.

Right, Nitrogen just changes pressure due to temp less than air, but it still changes. And no one has settled the question of whether the redesigned 2019 air suspension still allows outside air in if needed like the earlier models did.

 

[CaptainCJ35]

ALL gases, nitrogen included, change pressure due to temperature change (assuming constant volume).

My Grand Cherokee with air suspension has occasionally run the pump to adjust since day 1 (it's 6 years old), and it hasn't caused any problems. My Ram does it, too. Nothing to worry about.

All of this!

Being from New England... quite familiar with "deflation" and the Ideal Gas Law (Patriots reference). All gasses expand and contract based on temperature. That goes for the closed Nitrogen system in our Air Suspension. It will cycle on to maintain the desired pressure or ride height as temps fluctuate. As temps decrease, pressure in the spring decreases... increasing temps equal increasing pressure... so to maintain "Aero" mode for example, the pumps cycle on for the correct pressure for that ride setting.

Make sense?

 

[TruckDriver]

Air Suspension Random Adjust

2019 Limited 5.7 w/air suspension. Truck adjusts height when parked on level ground. Noticed this at home when I pull it out of the garage into the drive. Within a few minutes it hums(air compressor?) and makes a small downward height adjustment; lasts a couple seconds. My drive and garage are...

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