High pitched sound

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Jun 24, 2016 | 07:21 AM

1978vett

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Racer

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High pitched sound

When my key is turned to the on position ,, motor not running I can hear a high pitched sound . it sounds like it is coming from under the hood... it almost sounds like the seat belt warning only it is a steady sound.. I can still hear it after I start the motor .. It's not real loud but noticable.. This is on a 2004 Vette that I just purchased.... Thanks for any information...

Jun 24, 2016 | 07:53 AM

imgn tht

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From: LaGrange Park, IL IL

St. Jude Donor '13, '15

My guess is the fuel pump. I have it on my 2004 as well. Can usually hear it when sitting idle at a stop too.

Jun 24, 2016 | 08:14 AM

1978vett

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Racer

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Quote:

Originally Posted by imgn tht

My guess is the fuel pump. I have it on my 2004 as well. Can usually hear it when sitting idle at a stop too.

I assume it is a normal sound and not anything to be concerned about ?

Jun 24, 2016 | 09:22 AM

imgn tht

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From: LaGrange Park, IL IL

St. Jude Donor '13, '15

Yes, normal.

Jun 24, 2016 | 09:53 AM

nsogiba

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From: Buffalo NY

when you turn the key to ON, you should hear the fuel pump prime (high pitched whine) for 2 seconds, then shut off. When you start the engine, the pump will continue to run. Is that what you're experiencing?

Jun 24, 2016 | 10:34 AM

1978vett

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Racer

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Quote:

Originally Posted by nsogiba

It doesn't shut off after 2 seconds and continues after I start the engine.

Jun 24, 2016 | 10:38 AM

Macleod52

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From: Iowa

Check the Throttle Body. When I cleaned mine it was emitting a high pitched noise.

Jun 24, 2016 | 10:40 AM

1978vett

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Racer

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Quote:

Originally Posted by Macleod52

Check the Throttle Body. When I cleaned mine it was emitting a high pitched noise.

Would the Throttle Body do that with the key in the on position and the motor not running ?

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Jun 24, 2016 | 10:42 AM

nsogiba

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From: Buffalo NY

Quote:

Originally Posted by 1978vett

Would the Throttle Body do that with the key in the on position and the motor not running ?

It could be. My wife's Audi does this. Turn the key to on and stick your ear to the TB to see if it's it.

Jun 24, 2016 | 10:45 AM

#10

1978vett

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Racer

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Quote:

Originally Posted by nsogiba

It could be. My wife's Audi does this. Turn the key to on and stick your ear to the TB to see if it's it.

Going to check now,,, is that normal for it to do that ???

Jun 24, 2016 | 10:48 AM

#11

Macleod52

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From: Iowa

Quote:

Originally Posted by 1978vett

Going to check now,,, is that normal for it to do that ???

Not sure if it's normal but yes, when the key is in the ON position the TB receives power and you can press the gas pedal to move the flap so you can clean the TB.

Jun 24, 2016 | 10:54 AM

#12

1978vett

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Racer

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Quote:

Originally Posted by Macleod52

Not sure if it's normal but yes, when the key is in the ON position the TB receives power and you can press the gas pedal to move the flap so you can clean the TB.

I noticed this time when i turned the key to on it did stop after a few seconds,, then when I started the motor it I couls hear it again ... Couldn't hear it under hood,,, more like coming from behind the seat or towards the rear..

Jun 24, 2016 | 11:02 AM

#13

imgn tht

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From: LaGrange Park, IL IL

St. Jude Donor '13, '15

Quote:

Originally Posted by 1978vett

Couldn't hear it under hood,,, more like coming from behind the seat or towards the rear..

Which is where the fuel pump is located.

Jun 24, 2016 | 11:09 AM

#14

1978vett

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Racer

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Quote:

Originally Posted by imgn tht

Which is where the fuel pump is located.

Thanks for the help,,, I could have swore that yesterday it didn't stop after a few seconds with the key in the on position.. Just got the car a few days ago, still new to me, after having the 78 for a while..