|
|
|
|
| Author |
|
|
Registered User
Join Date: Dec 2019
Posts: 4
|
High Pitch Whining Noise from Engine Compartment - Engine Off/Ignition Switch On
When I turn ignition switch on to position 1 (position 2 is engine start) there is a high pitched whining noise coming from engine compartment. The high pitch whining noise is audible but not too loud. The whine is coming from center to right side of engine compartment as best that I can tell. Anyone have an idea what is causing this?
|
||
12-12-2019, 04:27 AM
|
|
|
unindicted co-conspirator
Join Date: Jul 2007
Location: Fresno, CA
Posts: 1,660
|
Probably the secondary air injection pump (SAI)
It comes on for a few minutes when cold started Sounds like a hair dryer It’s next to the coolant tank Have someone turn the key while you are in the back and see if it makes the noise from the SAI
__________________
'03 996 - sport exhaust, sport seats, M030 sport suspension, stability control, IMS Solution ‘86 928S3 - barn find project car Last edited by looneybin; 12-13-2019 at 04:25 PM.. |
||
|
12-13-2019, 04:22 PM
|
|
|
Registered
Join Date: Oct 2001
Location: San Carlos, CA US
Posts: 5,614
|
SAI is on the left side of the engine bay. The poster said the noise is coming from the right side.
__________________
Porsche 2005 GT3, 2006 997S with bore-scoring Exotic: Ferrari F360F1 TDF, Ferrari 328 GTS Disposable Car: BMW 530xiT, 2008 Mini Cooper S Two-wheel art: Ducati 907IE, Ducati 851 |
||
|
12-15-2019, 06:31 AM
|
|
|
unindicted co-conspirator
Join Date: Jul 2007
Location: Fresno, CA
Posts: 1,660
|
Hard to tell where it’s coming from unless you are standing at the back with the hood open
Power steering pump is on center/right side, Check the fluid level Edit: just noticed the key in acc part. Only thing that comes on with the key in acc is the SAI and maybe the fuel pump, but that’s in the front
__________________
'03 996 - sport exhaust, sport seats, M030 sport suspension, stability control, IMS Solution ‘86 928S3 - barn find project car Last edited by looneybin; 12-15-2019 at 02:42 PM.. |
||
|
12-15-2019, 02:39 PM
|
|
|
Registered User
Join Date: Dec 2019
Posts: 4
|
Thanks for replies. Checked power steering fluid level while cold with level just below the "HOT" marking on the measuring rod about 1/8". Checked level again after a drive letting engine cool for a few hours with fluid level right at "HOT" mark. Checked owner's manual "Power Steering Fluid Level" & there's this
"Note - The flow noise heard at full steering lock is design-related and does not indicate a defect in the steering system." |
||
|
12-15-2019, 04:51 PM
|
|
|
Registered
Join Date: Oct 2001
Location: San Carlos, CA US
Posts: 5,614
|
Fuel pump is NOT on with the engine off. Safety reason.
__________________
Porsche 2005 GT3, 2006 997S with bore-scoring Exotic: Ferrari F360F1 TDF, Ferrari 328 GTS Disposable Car: BMW 530xiT, 2008 Mini Cooper S Two-wheel art: Ducati 907IE, Ducati 851 |
||
|
12-16-2019, 12:38 AM
|
|
|
|
Registered
Join Date: Mar 2016
Posts: 940
|
Fresh air blower motor on earlier cars can shriek when the bearing wears out. Unplug & see if your noise disappears. There's one each in the frunk & engine bay.
|
||
|
01-12-2020, 08:19 PM
|
|
