Honda Accord/Prelude 1984-1995 Repair Guide

Electric Fuel Pump

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REMOVAL & INSTALLATION




CAUTION
Gasoline vapors are explosive. Remove components slowly and contain spillage. Observe "no smoking/no open flame" precautions. Have a Class B-C (dry powder) fire extinguisher within arm's reach at all times.

1985 Accord and 1985-87 Prelude

See Figure 1

  1. Disconnect the negative battery cable.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Loosen the lug nuts of the left rear wheel.
  6.  
  7. Elevate the rear of the car, supporting it safely on stands.
  8.  
  9. Remove the left rear wheel.
  10.  
  11. Remove the fuel pump cover.
  12.  
  13. Remove the 3 bolts securing the fuel pump with its mount.
  14.  
  15. Detach the electrical connectors.
  16.  
  17. Disconnect the clamped fuel hose from the pump.
  18.  
  19. Disconnect the flared fuel line fitting from the hose.
  20.  



Click image to see an enlarged view

Fig. Fig. 1: External fuel pump used on Accords and Preludes

  1. Remove the clamp, then remove the fuel pump from its mount.
  2.  
  3. Disconnect the fuel hose and silencer chamber from the pump.
  4.  

The fuel pump is not repairable and should not be disassembled.

To install:
  1. Install the fuel hose and silencer chamber onto the front of the pump with new washers. Tighten it to 20 ft. lbs. (28 Nm).
  2.  
  3. Install the fuel pump onto its mount.
  4.  
  5. Clean the sealing surface of the flared fuel line and connect it to the hose. Tighten the flare nut to 27 ft. lbs. (38 Nm).
  6.  
  7. Reconnect the wiring and the remaining fuel hose (use a new clamp if necessary.)
  8.  
  9. Install the pump. Tighten the mounting bolts until snug.
  10.  
  11. Connect the negative battery cable.
  12.  
  13. Have an assistant turn the ignition switch ON (without starting the engine); check the fuel line connections for any leakage. Cycle the ignition switch OFF/ON 2 or 3 more times to build pressure. The fuel line connections must be totally dry; no leakage is allowable.
  14.  
  15. Install the fuel pump cover and rear wheel.
  16.  

1986-89 Accord and 1988-95 Prelude

See Figure 2

  1. Disconnect the negative battery cable.
  2.  
  3. Lift or reposition the carpet in the luggage area. Remove the access cover in the floor.
  4.  
  5. Unplug the electrical connector at the pump unit.
  6.  
  7. Label and disconnect the fuel lines.
  8.  
  9. Carefully remove the retaining nuts securing the pump. When all are removed, lift the pump up and out of the tank.
  10.  



Click image to see an enlarged view

Fig. Fig. 2: Internal fuel pump used on Accords and Preludes. On 1990-95 Accords, it is necessary to remove the fuel tank first

The pump may require some manipulation to remove.

To install:
  1. Reinstall the pump, making certain it is correctly seated and not wedged or jammed. Install the retaining nuts, tightening them evenly and alternately to 48 inch lbs. (6 Nm).
  2.  
  3. Install the fuel lines. Make certain the clamps are secure; use new ones if necessary. If a fuel line is equipped with a banjo bolt fitting, use new washers and tighten the bolt to 20 ft. lbs. (28 Nm).
  4.  
  5. Connect the wiring.
  6.  
  7. Connect the negative battery cable, then start the engine. Check for any leaks.
  8.  
  9. Install the access cover and seal or gasket, if used.
  10.  
  11. Reposition the carpeting in the luggage compartment.
  12.  

1990-95 Accord

See Figure 2

  1. Disconnect the negative battery cable.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Remove the fuel tank (refer to the procedure outlined later in this section).
  6.  
  7. Remove the fuel pump mounting bolts, then remove the fuel pump assembly from the tank.
  8.  

To install:
  1. Reinstall the pump, making certain it is correctly seated and not wedged or jammed. Install the retaining nuts, tightening them evenly and alternately to 48 inch lbs. (6 Nm).
  2.  
  3. Reinstall the fuel tank.
  4.  

TESTING



See Figure 3

  1. Relieve the fuel system pressure.
  2.  
  3. Remove the service bolt.
  4.  
  5. Attach a fuel pressure gauge to the banjo bolt.
  6.  



Click image to see an enlarged view

Fig. Fig. 3: The pressure gauge may be attached to the fuel rail or fuel filter, depending on the model and year. Note the pressure regulator hose is disconnected

  1. Disconnect the vacuum hose from the pressure regulator, then plug the hose end.
  2.  
  3. Start the engine and let it idle.
  4.  
  5. Record the pressure reading on the gauge and compare it to the following specifications:

    1985-86 Prelude and 1985-87 Accord-33-39 psi (235-275 kPa)
     
    1987-90 Prelude and 1988-91 Accord (except 1991 SE and Canada EX-R)-36-41 psi (250-279 kPa)
     
    1991 Accord SE and Canada EX-R-38-48 psi (265-314 kPa)
     
    1991-95 Prelude (except VTEC)-37-44 psi (255-304 kPa)
     
    1992-95 Prelude VTEC-33-40 psi (230-280 kPa)
     
    1992-93 Accord-40-47 psi (274-323 kPa)
     
    1994-95 Accord (except V-6)-38-46 psi (265-314 kPa)
     
    1995 Accord V-6-44-51 psi (304-353 kPa)
     

  6.  
  7. If the pressure is higher than specified, inspect for a pinched or clogged fuel return hose/line or faulty fuel pressure regulator. If the pressure is lower than specified, inspect for a clogged fuel filter, faulty pressure regulator or leaks in the fuel hose/line.
  8.  
  9. Wrap a shop rag around the fuel pressure gauge fitting, then slowly loosen it to release the system pressure. Remove the pressure gauge.
  10.  
  11. Install the service bolt using new washers and tighten to 9 ft. lbs. (12 Nm).
  12.  

 
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