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Home >> Infiniti >> 1990 >> Q45 >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Fuel System >> Fuel Pump

Fuel Pump

The electric in-tank fuel pump is turned on by the ECU through the fuel pump relay. Fuel pump will be energized by the ECU, for up to 5 seconds when ignition is first turned on, during cranking and running, and will be de-energized within 1.5 seconds after engine stops.