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The whine could be a pulley, start the engine, raise the hood, and then rev the engine to see if you can duplicate the noise. It could be a weak belt, or a bad bearing in either the alternator, or a pulley when the engine is under a load. Check your fuel lines and the schrader valve on the fuel rail to ensure they are good, and stop the leak. Usually a fuel leak on an engine will dissipate to quickly and you can never find it, so be thankful that you did.