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    Acura Coupes and Sedans 1986-1993 Repair Guide

    Fuel Pump

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    The fuel pump on all models except the 1986-90 Integra, is located in the fuel tank. On the 1986-90 Integra the fuel pump is located under the rear of the vehicle, near the drivers side of the fuel tank.

    PRESSURE TESTING



    See Figure 1

    On all models, the fuel pump should run for about 2 seconds when the ignition is first turned ON . By removing the filler cap and listening at the filler, it should be possible to hear the pump run each time the ignition is switched ON . It will then stop again until the starter is activated.



    Click image to see an enlarged view

    Fig. Fig. 1: Checking the fuel system pressure

    1. Disconnect the negative battery cable and remove the fuel filler cap.
    2.  
    3. Relieve the fuel system pressure.
    4.  
    5. Remove the service bolt and attach a fuel pressure gauge to the top of the fuel filter.
    6.  
    7. Start the engine and measure the fuel pressure with the engine idling and vacuum hose to the pressure regulator disconnected;
    8.  



    1986-1989 Integra-35-41 psi. (240-279 kPa)
     
    1990-93 Integra-37-44 psi. (255-304 kPa)
     
    1989-90 Legend-36-41 psi. (250-279 kPa)
     
    1991-93 Legend-38-46 psi. (265-314 kPa)
     
    Vigor-43-50 psi. (300-350 kPa)
     

    1. Check to see that the pressure decreases when the vacuum hose is connected.
    2.  
    3. If the pressure is higher than specifications, check for a pinched or clogged fuel return hose or faulty pressure regulator.
    4.  
    5. If the pressure is lower than specifications, check for a clogged filter, defective pressure regulator or leakage in the fuel line.
    6.  
    7. After inspection, remove the pressure gauge and install the service bolt with a new washer.
    8.  

    REMOVAL & INSTALLATION



    1986-1989 Integra
    1. Disconnect the negative battery cable.
    2.  
    3. Relieve the fuel system pressure.
    4.  
    5. Raise and safely support the vehicle and remove the left rear wheel.
    6.  
    7. Remove the fuel pump cover bolts and the cover.
    8.  
    9. Remove the fuel pump mount bolts and the fuel pump with it's mount.
    10.  
    11. Disconnect the fuel hoses and the electrical connectors.
    12.  
    13. Installation is the reverse of removal. Use new sealing washers when connecting the fuel hoses. After the pump is installed, turn the ignition switch ON and OFF a number of times to pressurize the system and check for leaks.
    14.  

    1990-93 Integra and Vigor

    See Figures 2 and 3

    1. On Integra, remove the rear seat and access panel and disconnect the wiring.
    2.  
    3. Remove the fuel tank.
    4.  
    5. Remove the pump flange mounting nuts and lift the pump out.
    6.  
    7. Installation is the reverse of removal. Use new sealing washers when connecting the fuel hoses. After the pump is installed, turn the ignition switch ON and OFF a number of times to pressurize the system and check for leaks.
    8.  



    Click image to see an enlarged view

    Fig. Fig. 2: Removing the fuel pump access cover-Legend and Vigor



    Click image to see an enlarged view

    Fig. Fig. 3: Removing the fuel pump assembly-Legend and Vigor

    Legend
    1. Disconnect the negative battery cable.
    2.  
    3. Relieve the fuel system pressure.
    4.  
    5. Remove the maintenance access cover in the luggage area.
    6.  
    7. Disconnect the fuel lines and the electrical connectors.
    8.  
    9. Remove the fuel pump from the fuel tank.
    10.  
    11. Installation is the reverse of removal. Use new sealing washers when connecting the fuel hoses. After the pump is installed, turn the ignition switch ON and OFF a number of times to pressurize the system and check for leaks.
    12.  

     
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