Odd noise after shutdown
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Cross-Country
Joined: Aug 2024
Posts: 52
Likes: 29
From: East Arkansas
Odd noise after shutdown
I have noticed this a couple of times before. After shutting down and getting out of the truck while walking away I will hear a buzz or whrrring sound coming from the truck. Almost like an actuator of some kind cycling. Not really sure where on the truck its coming from but this morning it seemed to be toward the rear. I got maybe 30' away when I noticed it. The sound last maybe 3-5 seconds. Not enough time to get back for a closer look. It doesn't always happen so I can never really be ready to look for it. Any body else ever notice this? This is a 2024 F350 XLT 6.8l gas just turned 2K miles.
Lead Driver
Joined: Feb 2022
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Oh, these trucks make ALL kinds of noises when shut down. The biggest is the DEF tank. I swear it must be female with the big O sometimes it is so loud. I had the hood open the other day doing a fluid check, turned it on for a minute to get washer fluid going and shut it off, there were all kinds of clicks and whirs and pops going on under the hood, and that was without starting it.
Mountain Pass
Joined: Apr 2023
Posts: 137
Likes: 31
From: NE Missouri
Had this happen this morning. Seemed to come from the back of truck and was similar to hearing a windshield wiper on a dry window. Truck had been sitting in some heavy rain during church and we drove home (about 12 miles) in a decent rain.
Logistics Pro
Joined: Mar 2005
Posts: 3,557
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From: West Michigan
You are hearing the electric e-brake being triggered/tested. Certain conditions trigger it more often than others
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Lead Driver
Joined: Feb 2022
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It's the Evap control on the fuel tank. It has valve in it to close off the tank, and open to the carbon holding tank that is used during cold running to purge off fumes that would have otherwise been vented to atmosphere. My F150 did the same thing when shutting down.
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On my 23 4runner it is not unusual to hear it shutting off several hours after the vehicle has been off. Apparently it's "normal"
Last edited by twobelugas; Yesterday at 06:59 PM.
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