CRG Discussion Forum
Camaro Research Group Discussion => Maintenance => Topic started by: jdv69z on September 05, 2017, 07:09:57 PM
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302 in my Z runs great, but I am hearing a high pitched whistle while it runs. It is coming from the carburetor inlet; when I place my hand over the air horn, it disappears. Is this normal, or does someone have an idea what could be the cause? I have a brief video but it's 18.3 MB.
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If its coming from inside the venturi area it OK. The engine is pulling air and fuel through the carb circuits.
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The Holley on my big block does the same thing. More noticeable since I pulled off the cowl hood flap for full time cool air, providing a noise path.