Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSACURA2008RLREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMFUEL SUPPLY SYSTEMTRANSFER FUEL PUMP TEST

2008 Acura RL

Transfer Fuel Pump Test

2008 Acura RLSECTION Transfer Fuel Pump Test

Special Tools Required

Vacuum pump/gauge, 0-30 in.Hg, Snap-on YA4000A or equivalent, commercially available

NOTE: If the fuel tank is full, drain the fuel (see FUEL TANK DRAINING ).

Remove the fuel tank unit (see FUEL PUMP/FUEL GAUGE SENDING UNIT REPLACEMENT ).
Disconnect the transfer tube (A), then connect a vacuum pump/gauge, 0-30 in.Hg, to the fuel tank unit.

Fig 1: Identifying Transfer Tube
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Connect the fuel pump 5P connector.
Lower the fuel tank unit (A) into the fuel tank until the pick up screen is submerged in the fuel.

Fig 2: Identifying Fuel Tank Unit
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Turn the ignition switch ON (II).
From the INSPECTION MENU of the HDS, select Fuel Pump ON.
Read the vacuum pump/gauge, 0-30 in.Hg. The vacuum should be 4.0 kPa (1.2 in.Hg, 30 mmHg).
- If the vacuum is OK, go to step 8.
- If the vacuum is out of specification, replace the fuel tank unit (see FUEL PUMP/FUEL GAUGE SENDING UNIT REPLACEMENT ), then recheck the fuel vacuum.
Connect a vacuum pump/gauge, 0-30 in.Hg, to the transfer tube.

Fig 3: Connecting Vacuum Pump/Gauge To Transfer Tube
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Apply vacuum to the transfer tube.
- If the vacuum holds, replace the fuel tank (see FUEL TANK REPLACEMENT ).
- If the vacuum does not hold, the transfer fuel pump and the transfer tube are OK.

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.