FP whining
Excessive FP whine sometimes indicates imminent failure but 'noise' is subjective, especially if you're new to Mustangs. They all whine when you turn the key on and make a slight noise while driving. This is normal.
If the car runs fine then don't worry about it; just turn up the stereo. If it gets hard to start, begins to show signs of cutting out or starving at high RPM's, think new fuel pump.
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