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Discussion Starter · #1 ·
I have a 03 gt v6 and there is a whistling noise that comes from the engine, mostly when it heats up, i cannot pinpoint where the noise is coming from but it seems to be worse when im in gear at idle, when I rev the rpm to about 1k the whistle goes away. can anyone help:)
 

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Sounds like a vacuum leak. Perhaps at your intake manifold. I'd put some soapy water around the edges of the intake manifold where it meets the head of the engine and watch for the water getting sucked in somewhere.
 
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