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so i replaced the fuel pump in the mean time. and the noise is still there.
I noticed that the howling only occurs when i barely step on the gas pedal, then as soon as i left off it disappears. The noise also goes away after i step on the gas pedal beyond the "barely step-on" point.
Note: the A/C is never on when this occurs.
Is there some sort of pressurization system in the gas tank? what are all the components forward of the battery besides the fuel pump and radiators?
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