As per my question i asked before........what are the chances of it being the power steering pump making this noise?

Post subject: Mark 6 Fiesta 1300 duratec engine

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Every morning when i start the car a whineing noise sounding like a hen developes and then disapears when the car warms up. The car then runs fine. Any ideas as this noise is irritating. I have sprayed WD on the alternater wheel etc, but to no avail. The noise only appears when i accelerate, not when car is just ticking over.