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Loud whistle inside airbox near TB

This is a discussion on Loud whistle inside airbox near TB within the General Help forums, part of the LSx Technical Help Section category; Hey guys I have a loud whistle on warmup, it goes away after a few minutes, however is there any ...

  1. #1
    Junior Member JasperBrooks's Avatar
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    Loud whistle inside airbox near TB

    Hey guys I have a loud whistle on warmup, it goes away after a few minutes, however is there any way to fix this? Any help is greatly appreciated! Take care.

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    Moderator 98TransAmWs-6's Avatar
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    Do you still have the air pump or have you deleted it? If not it is probably that. Mine made a similar noise and I got rid of it and now no noise but maybe I can't hear it over my exhaust.
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    Junior Member JasperBrooks's Avatar
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    Its pretty much stock..ish so I'm assuming I do habe the air pump in place, ill give it a try, Thank you!

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    Moderator 98TransAmWs-6's Avatar
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    Quote Originally Posted by JasperBrooks View Post
    Its pretty much stock..ish so I'm assuming I do habe the air pump in place, ill give it a try, Thank you!
    You can also just remove the fuse as well as a test prior to removing the air pump since you will have to have block off plates on your exhaust manifolds to delete the air pump without exhaust leaks.

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    Junior Member JasperBrooks's Avatar
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    Roger that. Thank you for your help!

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    Here's a write up on the secondary air system: Secondary Air: Diagnosing and Removal The system only runs for a short time on cold start up, so very possible that this is the cause of your noise.

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    Junior Member JasperBrooks's Avatar
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    Thank you soo much very useful info!

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    Glad to assist. Let us know what you find once you tear into it. Easiest check would be to pull the fuse for the secondary air and see if the noise goes away. You'll probably trip the SES in the process. The system only activates on cold startup -- once the engine is warm, I can't say for certain if it runs the pump or not.

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    Moderator 35th-ANV-SS's Avatar
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    Pump only runs on initial start up I'm fairly certain.
    It's on jackstands.

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    That's what I thought, but it has been awhile since I read all that stuff.

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    Retired NOT tired SteveC's Avatar
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    Be aware that if your state requires a "smog certificate" to register the vehicle, removing or disconnecting the air pump (where it can not be reconnected), can cause more problems than what it is worth.

    SteveC

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