Acura 17708-SD4-023 Fuel Pump Unit Assembly

Begin by inspecting all fuel lines for leaks if there is a suspicion of insufficient fuel delivery. For fuel pump checks, set the parking brake and have someone turn the ignition switch to the On position while listening for a whirring sound from the fuel pump, which should last a couple of seconds and become continuous when the engine starts. If there is no sound, the fuel pump or the fuel main relay circuit may be defective. To check fuel pressure, relieve it first, then remove the service bolt from the fuel filter and attach a fuel pressure gauge using a special adapter. Start the engine, detach the vacuum hose from the pressure regulator, and measure the fuel pressure. If the pressure is not within specification, check for a faulty regulator, a clogged fuel filter, pinched hoses, or leaks in the fuel line. If no issues are found, check the fuel pump by verifying it runs when the ignition is turned to On, producing a brief whirring noise. If it does not sound, raise the rear of the vehicle securely, remove the aft rear wheel, and access the fuel pump cover to detach the wires. Use a voltmeter to check for voltage at the fuel pump connector; if voltage is present, replace the fuel pump. If no voltage is detected, test the main relay by removing it and using jumper wires to check continuity between the relay terminals. If continuity is absent in any test, replace the relay.

Installation is done in the reverse order of removal.