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Most fuel pumps operate on 12-14.2 Volts. (system voltage). Keep in mind that most fuel pumps operate off a relay and the relay is turned on and off by the engine computer. Most computer control the GROUND circuit of the relay to power it on and off.

It is fairly common to have to replace the fuel pump in the tank as the brushes wear out after about 100,000 miles

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15y ago

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