# High-pitched whistling sound coming from front of car

**URL:** <https://community.cartalk.com/t/high-pitched-whistling-sound-coming-from-front-of-car/91519>\
**Category:** Maintenance/Repairs\
**Created:** [October 23, 2015, 1:58am UTC](https://community.cartalk.com/t/high-pitched-whistling-sound-coming-from-front-of-car/91519 "2015-10-23T01:58:06Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![legarvey](https://avatars.discourse-cdn.com/v4/letter/l/a4c791/32.png) [@legarvey](https://community.cartalk.com/u/legarvey)\
**Post date:** [October 23, 2015, 1:58am UTC](https://community.cartalk.com/t/high-pitched-whistling-sound-coming-from-front-of-car/91519/1 "2015-10-23T01:58:06Z")

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I have recently noticed that there is a loud, high-pitched whistling sound coming from under my hood that has progressively gotten worse over the weeks. At first, it would only occur when I had my AC or heat on and would stop immediately once i turned the AC/heat off, and will also happen from time to time when I accelerate. Now, this noise is happening right when I start my car and takes a few seconds to stop.

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**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\
**Post date:** [October 23, 2015, 2:10am UTC](https://community.cartalk.com/t/high-pitched-whistling-sound-coming-from-front-of-car/91519/2 "2015-10-23T02:10:22Z")

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My prime suspect would be a disconnected or cracked vacuum hose.  
Are there any other symptoms, such as an engine that is idling rougher than it used to, and/or a lit-up Check Engine Light?

Incidentally, revealing the make, model, model year, and odometer mileage of your vehicle is a good idea if you are looking for really specific responses.

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**Author:** ![MY\_2\_CENTS](https://avatars.discourse-cdn.com/v4/letter/m/22d042/32.png) [@MY\_2\_CENTS](https://community.cartalk.com/u/MY_2_CENTS)\
**Post date:** [October 23, 2015, 2:48am UTC](https://community.cartalk.com/t/high-pitched-whistling-sound-coming-from-front-of-car/91519/3 "2015-10-23T02:48:41Z")

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Sounds like a slipping belt to me.

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**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\
**Post date:** [October 23, 2015, 2:53am UTC](https://community.cartalk.com/t/high-pitched-whistling-sound-coming-from-front-of-car/91519/4 "2015-10-23T02:53:49Z")

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**^**  
 Yes, if the noise could be described as a shrieking sound, then I agree that it would likely be a slipping belt.

I was assuming that the noise really is a whistling sound, but I suppose that one man’s whistle could be another man’s shriek.

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**Author:** ![MY\_2\_CENTS](https://avatars.discourse-cdn.com/v4/letter/m/22d042/32.png) [@MY\_2\_CENTS](https://community.cartalk.com/u/MY_2_CENTS)\
**Post date:** [October 23, 2015, 3:19am UTC](https://community.cartalk.com/t/high-pitched-whistling-sound-coming-from-front-of-car/91519/5 "2015-10-23T03:19:14Z")

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@VDCdriver

“One man’s whistle could be another man’s shriek”

So true!