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Fuel pump is humming loudly...has been for 1200 miles now

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The pump vibrates because the rotor bearings are worn out - you must replace the pump.

Posted on Oct 01, 2010

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Posted on Jan 02, 2017

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If he did not change the fuel filter the pump would fail quickly. Since you changed the filter the next pump may last a long time.
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POOR GAS MILEAGE


Have you changed the fuel filter? I know it sounds weird but a plugged filter will make a truck use more gas. The computer tries to compensate for less fuel by commanding the injectors to open longer. Also a plugged filter will cause excess back pressure on the fuel pump making it loud.. Good Luck.

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