Air Suspension / Leveling System
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Air Suspension / Leveling System
Just picked up a 2001 Expedition XLT in mint condition, 36k miles. It has the air / load leveling system. I've never had a truck with this setup before so I am not sure how it works.
So here's my question ... everytime I turn the truck on, I can hear the air compressor work. It's kind of noisey - it grumbles and rumbles for about 10 seconds or so, then shuts off. I don't hear it again until I've shut the car off and started it again.
Is this normal? Do you normally hear the compressor working while you are driving the car? The truck seems to level itself just fine and the compressor does turn itself off after a few seconds, so I don't think there is a malfunction, unless I am not supposed to hear it when it runs.
Second question ... I am thinking about just turning the system off and only using it when I tow. The rumbling just annoys me. Is it OK to do that or will that create any problems?
So here's my question ... everytime I turn the truck on, I can hear the air compressor work. It's kind of noisey - it grumbles and rumbles for about 10 seconds or so, then shuts off. I don't hear it again until I've shut the car off and started it again.
Is this normal? Do you normally hear the compressor working while you are driving the car? The truck seems to level itself just fine and the compressor does turn itself off after a few seconds, so I don't think there is a malfunction, unless I am not supposed to hear it when it runs.
Second question ... I am thinking about just turning the system off and only using it when I tow. The rumbling just annoys me. Is it OK to do that or will that create any problems?
Laughing Gas
Joined: Feb 2006
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I am sure someone with more experience with these will chime in, though I think your problem is the rubber isolators on the compressor (causing the noise). If they are bad and let got for too long it will damage the compressor.
Senior User
Joined: Sep 2009
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First of all I would never turn it off if you are towing, it is meant to be on all the time. As for the rumbling noise that could be a couple of things. One thing that is possible are the rubber isolators like c_hogensee said. The other thing I know that would make that noise is the compressor is going bad. They do have a tendency to go out allot, I would check to see if the compressor is making more noise than it should. Normally you barley hear the compressors when they run, Sometimes in the cold they can be a little more noisy than when it’s warm out.
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