Something turns on after the car is turned off

mdozier

I have a Lincoln Town Car '04 only had it for a few months now.
Anytime I turn the car off and get out, I can hear something turn on really loud. Usually only last for a few seconds.
It happens a lot more now and the car didn't have to have been running.
Looks like the sound come from around the front driver side under what I assume is the air filter.

Any idea what this is or is it normal?

mdozier

Just a little follow up.
It’s been 2 days, and I still don’t hear the sound any more.
I’m thinking turning the air ride switch off for a few stops,
then turning it back on fixed the problem.
I’ve had around 25-30 stops with all my running around.
And it’s still quite.
The only variable I can think of now, is that the system is not working at all.
Since I knew it was working before because of the sound.
It’s supposed to work quietly, so working correctly I could confuse with not even on
Is there an easy way to verify it’s on and working?
I have no check engine lights on.

Thanks for the help

[Deleted User]

Radiator fan perhaps?

mdozier

I don’t think so, sounds more like a compressor or something like that

[Deleted User]

Probably the pump for the airride suspension, assuming your Lincoln has it.
When you get in our out, it changes the ride height, so it corrects it.

mdozier

That's what a friend of mine said it might be, too.
Why is it so loud and rough sounding.
Is it a sign that the device is about to fail completely.

Can it be corrected?

mdozier

Today I believe I tracked the problem.
i turned off the air ride suspension by the switch. The problem\noise did not return.
i turned it back on, and seems to have fixed it.
Does this sound correct?

Mr_Shiftright

Well if there was a problem, there should be a "check air suspension" light going on.