Makes a whistle when I step on the gas
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1995 Ford Mustang Question: Air Leak
Answer #1Bret Bodas from RepairPal Test Shop, January 20, 2009, 13:30Master
A whistle noise can come from a vacuum leak, a drive belt, or possible a bad bearing in the alternator, water pump etc. Where is the noise coming from? Does it happen when you accelerate the engine and the vehicle is in neutral?