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Old 03-14-2024, 10:26 PM #1
philskeeter philskeeter is offline
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Help with whining noise

The searches I’ve come across seem to all be people talking about the humming noise where the vehicle is running a systems check after the vehicle has been off a few hours. I’ve heard that noise and am familiar with it and this is not the same noise. I’ve got a 2023 4Runner with 8,000 miles and I’ve heard this whining noise probably 15 times start the past month. The first few times was while I was sitting at a stop light. I thought steering pump, but when I turned my steering wheel while hearing the noise, it never changed. Then I started to hear it within a few minutes of shutting the vehicle off so I ruled out power steering pump and bearing or tensioner pulley. My next best guess is a vacuum leak? It’s coming from underneath the vehicle and seems like it is near the fuel tank. Is it a fuel pump noise? I couldn’t post the video, so here is a link to hear the noise

IMG 2920 - YouTube

I haven’t taken it to the dealer yet because this noise doesn’t happen every time I turn the vehicle off. From past experience, they use not being able to recreate the noise as a reason to not fool with it. Thanks in advance!
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Old 05-30-2024, 05:16 AM #2
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I am having the same issue now. Did you find any solution to solve this whining noise?
geometry dash scratch

Last edited by andreamoon; 06-02-2024 at 01:48 PM.
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Old 05-30-2024, 09:18 AM #3
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Originally Posted by andreamoon View Post
I am having the same issue now. Did you find any solution to solve this whining noise?
I think it is definitely something to do with the fuel system. a smoke test would probably find the leak. if it's not a leak could be the charcoal canister. do you have a check engine light, poor performance and mileage?
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Old 05-30-2024, 02:04 PM #4
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I typically leave the wife & kids at home & magically the whining stops.
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Old 05-31-2024, 09:12 AM #5
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Check if the noise changes with the fuel level. Does it get louder when the tank is full or low? Also, inspect the fuel lines for any kinks or damage.
A faulty fuel pump relay can cause whining noises. The EVAP system might also make strange noises if there's a small leak or the purge valve isn't working right. A smoke test can help find leaks in this system.
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