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What would cause a squealing noise under the hood of an 2003 Ford F250 when the gas pedal is pushed?

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Squealing

A loose belt is the most likely culprit, when you press on the gas all of a sudden the engine will respond quickly but a belt driven component like the alternator will give resistance thus causing the squeal.

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First answer by Ganderton. Last edit by Ganderton. Contributor trust: 1821 [recommend contributor]. Question popularity: 4 [recommend question]

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