Generation III Internal Engine 1997-2006 LS1 | LS6
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Old 07-07-2016, 09:58 PM
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Hi,

I have a video clip on a noise I am hearing, its on start up and lasts for about 40 seconds and stops. A bit of a whine noise???? Any ideas???


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Old 07-08-2016, 12:28 AM
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If it's that whistle sound, it sounds like the IAC opening up to add a ton of air at startup and as the engine warms and idle air drops the IAC closes and the whistle goes away.

First time I heard it do that I though it was an accessory bearing.

The stock kid and baffles were designed to use acoustics to cancel that noise.
Old 07-08-2016, 09:47 PM
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Hi,

Thank you for the reply, it sounds more like an electric motor running very fast and does whine a bit.



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