Faint, high-pitched whistling sound - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

retrosmiths · 04-16-2015, 02:58 PM

Anyone else having this issue?

Usually happens when the engine is warm
Gets a bit louder/higher-pitched on higher RPMs
(NOT!) Cannot reproduce if the car is parked and I rev
Sounds something like a tea kettle noise
Stock exhaust pipes, stock intake system except for K&N drop-in filter
I triple-checked the filter to make sure it sits properly and that the box closes fully
I also plugged the pipe that leads from the intake to the cabin, and it didn't help
No matching symptoms with an intake/exhaust leak

Tcoat · 04-16-2015, 03:01 PM

You nailed everything I thought of at first.
Vacuum leak someplace?

retrosmiths · 04-16-2015, 03:39 PM

Quote:

Originally Posted by Tcoat

You nailed everything I thought of at first.
Vacuum leak someplace?

If there is one, it would affect my MPG somewhat, and I'm still in the 23-26 range. Exhaust still sounds normal.

Tcoat · 04-16-2015, 03:43 PM

Quote:

Originally Posted by retrosmiths

If there is one, it would affect my MPG somewhat, and I'm still in the 23-26 range. Exhaust still sounds normal.

If it was bad enough that it effected your mileage you would throw a CEL.
Have had that sort of sound you described from collapsed vacuum lines or very small holes that didn't impact the actual system before in other cars. They are an absolute bitch to track down!

retrosmiths · 04-16-2015, 04:27 PM

http://www.ft86club.com/forums/showt...light=vac+leak

This hose is still attached properly, as far as I can see.

White64Goat · 04-16-2015, 04:39 PM

I'm assuming that this occurs while driving?

retrosmiths · 04-16-2015, 04:45 PM

Quote:

Originally Posted by White64Goat

I'm assuming that this occurs while driving?

Yes.

> Cannot reproduce if the car is parked and I rev

White64Goat · 04-16-2015, 04:51 PM

Chance that is a wind noise through the grill or from around a headlight or turn signal?

retrosmiths · 04-16-2015, 04:52 PM

Quote:

Originally Posted by White64Goat

Chance that is a wind noise through the grill or from around a headlight or turn signal?

That matches the RPM?

White64Goat · 04-16-2015, 04:56 PM

So you're only hearing it at a specific RPM range in each gear and not once you reach a certain speed?

retrosmiths · 04-16-2015, 04:59 PM

Quote:

Originally Posted by White64Goat

So you're only hearing it at a specific RPM range in each gear and not once you reach a certain speed?

Nope, across all range regardless of speed, but the car has to be moving, which is so weird. It gets subtly louder with increasing RPM.

continuecrushing · 04-16-2015, 05:05 PM

get up to speed and throw the car in neutral? Just to make sure its not a wind noise from airflow

determines if its from the engine, or car

White64Goat · 04-16-2015, 05:07 PM

That would tend to eliminate the throw-out bearing (if it's a manual trans.) Since you only hear it while moving my next thought would be a dust shield rubbing on a brake rotor.

What Shutter said ...........

retrosmiths · 04-16-2015, 05:17 PM

Quote:

Originally Posted by Shutter

get up to speed and throw the car in neutral? Just to make sure its not a wind noise from airflow

determines if its from the engine, or car

Alright, let me try this later on the way home. Good call.

04-16-2015, 02:58 PM	#1
retrosmiths Senior Member Join Date: May 2013 Drives: Scion FR-S Whiteout Location: Hollywood, CA Posts: 962 Thanks: 297 Thanked 241 Times in 137 Posts Mentioned: 22 Post(s) Tagged: 0 Thread(s)	Faint, high-pitched whistling sound Anyone else having this issue? Usually happens when the engine is warm Gets a bit louder/higher-pitched on higher RPMs (NOT!) Cannot reproduce if the car is parked and I rev Sounds something like a tea kettle noise Stock exhaust pipes, stock intake system except for K&N drop-in filter I triple-checked the filter to make sure it sits properly and that the box closes fully I also plugged the pipe that leads from the intake to the cabin, and it didn't help No matching symptoms with an intake/exhaust leak __________________ 2013 Scion FR-S Last edited by retrosmiths; 04-16-2015 at 07:43 PM.

04-16-2015, 03:01 PM	#2
Tcoat Senior Member Join Date: Jul 2014 Drives: 2020 Hakone Location: London, Ont Posts: 69,845 Thanks: 61,656 Thanked 108,283 Times in 46,456 Posts Mentioned: 2495 Post(s) Tagged: 50 Thread(s)	You nailed everything I thought of at first. Vacuum leak someplace? __________________ Racecar spelled backwards is Racecar, because Racecar.

04-16-2015, 04:27 PM	#5
retrosmiths Senior Member Join Date: May 2013 Drives: Scion FR-S Whiteout Location: Hollywood, CA Posts: 962 Thanks: 297 Thanked 241 Times in 137 Posts Mentioned: 22 Post(s) Tagged: 0 Thread(s)	http://www.ft86club.com/forums/showt...light=vac+leak This hose is still attached properly, as far as I can see. __________________ 2013 Scion FR-S

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04-16-2015, 04:39 PM	#6
White64Goat Senior Member Join Date: Jun 2012 Drives: 13 BRZ CBS LTD MT, 02 WRX Location: Fred. Co. Md. Posts: 2,346 Thanks: 65 Thanked 1,111 Times in 627 Posts Mentioned: 19 Post(s) Tagged: 1 Thread(s)	I'm assuming that this occurs while driving?

04-16-2015, 04:51 PM	#8
White64Goat Senior Member Join Date: Jun 2012 Drives: 13 BRZ CBS LTD MT, 02 WRX Location: Fred. Co. Md. Posts: 2,346 Thanks: 65 Thanked 1,111 Times in 627 Posts Mentioned: 19 Post(s) Tagged: 1 Thread(s)	Chance that is a wind noise through the grill or from around a headlight or turn signal?

04-16-2015, 04:56 PM	#10
White64Goat Senior Member Join Date: Jun 2012 Drives: 13 BRZ CBS LTD MT, 02 WRX Location: Fred. Co. Md. Posts: 2,346 Thanks: 65 Thanked 1,111 Times in 627 Posts Mentioned: 19 Post(s) Tagged: 1 Thread(s)	So you're only hearing it at a specific RPM range in each gear and not once you reach a certain speed?

04-16-2015, 05:05 PM	#12
continuecrushing Join Date: Mar 2013 Drives: 2013 Firestorm FRS Location: Lake Elsinore, CA Posts: 2,707 Thanks: 1,231 Thanked 2,144 Times in 1,003 Posts Mentioned: 73 Post(s) Tagged: 2 Thread(s)	get up to speed and throw the car in neutral? Just to make sure its not a wind noise from airflow determines if its from the engine, or car

04-16-2015, 05:07 PM	#13
White64Goat Senior Member Join Date: Jun 2012 Drives: 13 BRZ CBS LTD MT, 02 WRX Location: Fred. Co. Md. Posts: 2,346 Thanks: 65 Thanked 1,111 Times in 627 Posts Mentioned: 19 Post(s) Tagged: 1 Thread(s)	That would tend to eliminate the throw-out bearing (if it's a manual trans.) Since you only hear it while moving my next thought would be a dust shield rubbing on a brake rotor. What Shutter said ...........

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