Honda - Accord Prelude 1996 2000

Fuel Pump

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REMOVAL & INSTALLATION




CAUTION
Observe all applicable safety precautions when working around fuel. Whenever servicing the fuel system, always work in a well-ventilated area. Do not allow fuel spray or vapors to come in contact with a spark or open flame. Keep a dry chemical fire extinguisher near the work area. Always keep fuel in a container specifically designed for fuel storage; also, always properly seal fuel containers to avoid the possibility of fire or explosion.

Prelude
1996 MODELS

CAUTION
The fuel injection system remains under pressure, even after the engine has been turned OFF. The fuel system pressure MUST BE relieved before disconnecting any fuel lines. Failure to do so may result in fire and/or personal injury.

  1. Disconnect the negative battery cable.
  2.  
  3. Open the fuel tank filler cap to vent off pressure in the tank.
  4.  
  5. Relieve the fuel pressure, as outlined earlier in this section.
  6.  
  7. Remove the access panel in the trunk.
  8.  
  9. Detach the electrical connector from the fuel pump.
  10.  
  11. Remove the fuel pump mounting nuts.
  12.  
  13. Remove the fuel pump assembly from the tank.
  14.  
  15. Installation is the reverse of removal.
  16.  
  17. Torque the fuel pump mounting nuts to 4 ft. lbs. (6 Nm).
  18.  

1997-00 MODELS


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Fig. You must remove the rear floor beam to get to the fuel pump access panel



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Fig. The access panel is secured with retaining screws


CAUTION
The fuel injection system remains under pressure, even after the engine has been turned OFF. The fuel system pressure MUST BE relieved before disconnecting any fuel lines. Failure to do so may result in fire and/or personal injury.

  1. Disconnect the negative battery cable.
  2.  
  3. Open the fuel tank filler cap to vent off pressure in the tank.
  4.  
  5. Relieve the fuel pressure, as outlined earlier in this section.
  6.  
  7. Remove the rear seat cushion.
  8.  
  9. Pull the carpet up.
  10.  
  11. Remove the rear floor beam.
  12.  
  13. Pull the access panel from the floor.
  14.  
  15. Remove the fuel pump wiring harness from the pump.
  16.  
  17. Using square-nosed pliers, squeeze the spring loaded fuel clamp tabs together to release the clamp's tension and slide the clamp down the fuel line.
  18.  
  19. Press the two tabs on the quick-connect fuel line in, and slide the fuel hose away from the fuel line.
  20.  
  21. Remove the 8mm nuts securing the fuel pump mounting plate to the fuel tank, and carefully extract the fuel pump assembly from the fuel tank.
  22.  


WARNING
Ensure that the battery is disconnected before any wires are removed.

  1. Installation is the reverse of the removal procedure, making sure to replace the fuel pump mounting plate seal.
  2.  

Accord
1996-97 MODELS


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Fig. Once the fuel tank is removed, unfasten the retainers, then remove the fuel pump from the tank

  1. Remove the negative battery cable.
  2.  
  3. Remove the fuel tank as outlined later in this section.
  4.  
  5. Detach the fuel pump electrical connector.
  6.  
  7. Remove the fuel pump mounting nuts.
  8.  
  9. Pull the pump from the tank.
  10.  
  11. Install the fuel pump in the reverse order of removal.
  12.  
  13. Torque the fuel pump mounting nuts to 4.3 ft. lbs. (5.8 Nm).
  14.  

1998-00 MODELS

CAUTION
The fuel injection system remains under pressure, even after the engine has been turned OFF. The fuel system pressure MUST BE relieved before disconnecting any fuel lines. Failure to do so may result in fire and/or personal injury.

  1. Disconnect the negative battery cable.
  2.  
  3. Open the fuel tank filler cap to vent off pressure in the tank.
  4.  
  5. Relieve the fuel pressure, as outlined earlier in this section.
  6.  
  7. Open the trunk and remove the spare tire lid.
  8.  
  9. Remove the access panel from the floor.
  10.  
  11. Detach the fuel pump electrical connector.
  12.  


WARNING
Ensure that the battery is disconnected before any wires are removed.

  1. Detach the fuel lines from the pump.
  2.  
  3. Unscrew the bolts and remove the fuel pump assembly.
  4.  
  5. If necessary, remove the bracket, the fuel filter, the fuel gauge sending unit, the hose, and the wire harness.
  6.  



Click image to see an enlarged view

Fig. Unfasten the fuel pump retaining bolts (A), then remove the fuel pump assembly (B) from the tank



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Fig. Remove the bracket (A), the fuel filter (B), the fuel gauge sending unit (C), the hose (D), and the wire harness (E)

  1. Installation is the reverse of the removal procedure, making sure to replace the fuel pump mounting plate seal.
  2.  

TESTING



Fuel Pump Circuit

If you suspect a problem with the fuel pump, listen for the pump to operate by removing the fuel fill cap and checking to see if the pump can be heard running during the first two seconds after the ignition key is turned to the ON position. You should hear the fuel pump motor run.

If the fuel pump can be heard running, the fuel pump's electrical circuit is likely to be OK and the fuel pump operating pressure should be checked as outlined later in this section.

Once the engine has started, the fuel pump operation is controlled by the Powertrain Control Module (PCM) via the PGM-FI Main Relay. The fuel pump receives its electrical power from the PGM-FI Main Relay, which is triggered for two seconds when the ignition switch is initially turned to the on position.

After the initial two-second startup signal is received, the PGM-FI Main Relay is controlled by the PCM. Because the fuel pump receives its power from the PGM-FI Main Relay, a problem with the ignition switch, PCM, or electrical wiring may not allow battery voltage to reach the pump.

To check the fuel pump wiring proceed as follows:

  1. Make sure the ignition switch is in the OFF position.
  2.  
  3. Locate and detach the fuel pump electrical connector at the fuel tank.
  4.  
  5. You may have to remove the floor access panel. For specific details, see the fuel pump removal procedure in this section.
  6.  
  7. Fuel pump access is limited on some 1996-97 models of the Accord and may require you to work under the vehicle. Perform the following steps if that is the situation:
    1. Raise the vehicle and safely support it on suitable jackstands.
    2.  
    3. Remove the protective cover from the fuel tank fuel hoses.
    4.  

  8.  
  9. Detach the fuel pump electrical connector.
  10.  
  11. Connect a suitable Voltmeter between the fuel pump positive terminal of the electrical connector and a known good chassis ground.
  12.  
  13. Hold the electrical connector of the PGM-FI Main Relay so the wire side of the female terminals is visible and install a jumper wire between terminal Nos. 4 and 5.
  14.  
  15. When the ignition switch is turned ON , battery voltage should be present at the fuel pump electrical connector.
  16.  
  17. If the battery voltage is present, check the fuel pump's ground.
  18.  
  19. If the ground is "OK", check the fuel pump.
  20.  
  21. If battery voltage is not present, trace the wiring harness and check the cause for an open or shorted circuit.
  22.  
  23. If all wiring checks out, test the fuel pressure, as outlined later in this section.
  24.  

Fuel Pump Pressure

The fuel pressure should be checked at the fuel rail or at the fuel feed line for the fuel rail. The fuel pressure is checked with the engine started, thus the fuel pressure gauge must not interrupt the flow of fuel to the fuel rail and the fuel injectors.

To attach a fuel pressure gauge to the pressurized fuel loop requires the use of an adapter that is capable of safely withstanding the fuel system fuel pressure.


WARNING
Checking the fuel system fuel pressure requires the use of an in-line fuel pressure gauge with the engine running. Do not perform this check if suitable test equipment and fuel fittings are not available. The fuel system operates under pressure, if any fuel leakage is noticed while performing this check STOP immediately and do not continue until the source of the leak is resolved. Do not perform this test near sources of heat, spark, or flames. This test must be performed in a well-ventilated area.


CAUTION
The fuel injection system remains under pressure, even after the engine has been turned OFF . The fuel system pressure MUST BE relieved before disconnecting any fuel lines. Failure to do so may result in fire and/or personal injury.

To check the fuel system pressure proceed as follows:

  1. Remove the fuel filler cap and relieve the residual fuel pressure. For specific details, refer to the relieving fuel pressure coverage in this section.
  2.  
  3. Attach a suitable fuel pressure gauge to the fuel injection fuel loop as follows:
  4.  

Models such as the 1998-00 Accord have a fuel pulsation dampener which must be removed in place of the banjo bolt for testing.



1996-97 Accord with 4-cylinder engines and 1996-00 Prelude: Remove the service/banjo bolt from the end of the fuel rail. Install the fuel pressure gauge using a suitable fitting to temporarily substitute for the banjo bolt or in place of the service bolt that will allow fuel to be supplied to the gauge and the fuel rail.
 
1996-97 Accord with V6 engines: Remove the banjo bolt from the fuel filter outlet and install the pressure gauge using a suitable fitting to temporarily substitute for the banjo bolt and supply fuel to the gauge and the fuel rail.
 
1998-00 Accord: Remove the fuel pulsation damper from the end of the fuel rail and install a suitable fuel pressure gauge in its place.
 

  1. Remove and plug the vacuum line for the fuel pressure regulator located near the end of the fuel rail.
  2.  
  3. Start the engine and note the fuel pressure. With the pressure regulator vacuum hose disconnected and plugged, the fuel pressure should register as follows:

    2.2L engines: 38-46 psi (260-310 kPa)
     
    2.3L engines: 47-54 psi (320-370 kPa)
     
    2.7L engines: 40-47 psi (270-320 kPa)
     
    3.0L engines: 41-48 psi (280-330 kPa)
     

  4.  

If the engine wont start, turn on the ignition switch ON, wait two seconds, then turn off the ignition switch OFF. Turn the ignition switch back ON again and read the fuel pressure.

  1. If the fuel pressure is higher than specification check for a pinched or restricted fuel return hose or line.
  2.  
  3. If the fuel pressure is lower than the specification check for a damaged fuel pressure regulator, clogged fuel filter, fuel feed line or a leak in the fuel feed line. If the fuel pressure regulator, fuel feed lines, and fuel pump are OK, replace the fuel pump and fuel filter.
  4.  

The fuel pressure regulator testing procedures are located later in this section.

Once the test is complete, perform the following:

  1. Carefully remove the fuel pressure gauge and test fittings.
  2.  
  3. Install the removed fasteners using new sealing washers.
  4.  
  5. Install the fuel filler cap.
  6.  
  7. Start the engine and check for any fuel leaks, and repair as necessary.
  8.  

 
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