air suspension issue on 2001 Ford Expedition

im having an air suspension issue >> i hear what im assuming is a compressor kicking in when while i drive or when i start the car... when the car has been turned off any consideraable amount of time my back suspension is lowered..when i turn on the car I wait until the compressor turns off and the back suspension has risen<<

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1 answer 1 comment
The most likely cause of your concern is leak rear air shocks. Inspect the shocks where the rubber folds inside itself, if there is cracking, spray a soapy water solution on the area while the air suspension is running. If there is leaks identified, shock replacement is required.
I have same problem but if I turn them off in the trunk it takes about 3 dayes for them to leak down.