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Re: high pitched sound
Maybe you can further isolate the source of the noise. It would not hurt to check all vacuum line connections if you already have not done that. Also, check the throttle body mounting bolts or any component in the air intake system. For alternator you can remove the serpentine drive belt and run the car for a short period of time, preferably at idle only. Just make sure your battery is fulled charged up before doing this type test. Plus you can safely run without the supercharger drive belt hooked up.
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