Subaru ff-1/1300/1400/1600/1800/Brat 1970-1984 Repair Guide

Electric Fuel Pump

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The fuel pump is located under the center of the vehicle, in front of the fuel tank (1984 models).

A diaphragm type electromagnetic pump is used. If the pump fails, it must be replaced as an assembly, since it cannot be rebuilt.

REMOVAL & INSTALLATION



  1. Release the fuel system pressure and disconnect the negative battery cable.
  2.  
  3. Keep the fuel pump harness disconnected after releasing the fuel system pressure.
  4.  
  5. Raise and support the vehicle safely.
  6.  
  7. Clamp the middle portion of the thick hose connecting the pipe and the pump to prevent fuel from flowing out of the tank.
  8.  
  9. Loosen the hose clamp and disconnect the hose.
  10.  
  11. Remove the three pump bracket mounting bolts and remove the pump together with the pump damper.
  12.  



Click image to see an enlarged view

Fig. Fig. 1 Fuel pump and damper on the 1800 Turbo Brat

To install:

  1. If the pump and damper have been removed from the bracket, reinstall and tighten the bolts securely.
  2.  
  3. Install the hose and tighten the clamp screw to 0.7-1.1 ft. lbs. (1.0-1.5 Nm).
  4.  
  5. Install the pump bracket in position to the vehicle body and secure it with the bolts.
  6.  


WARNING
Take care to position the rubber cushion properly.

  1. Connect the pump harness connector.
  2.  
  3. Connect the negative battery cable and test the fuel pump for proper operation.
  4.  



Click image to see an enlarged view

Fig. Fig. 2 Fuel pump and damper on the 1800 Turbo wagon

TESTING



  1. Turn the ignition ON and listen for the fuel pump to make a growling sound. Turn the ignition OFF .
  2.  
  3. Release the fuel system pressure. Disconnect the pump connector and crank the engine for 5 seconds or more. If the engine starts, allow it to run until it stops. Turn the ignition OFF and install the fuel pump connector.
  4.  
  5. Disconnect the fuel hose at the fuel pump.
  6.  
  7. Connect a gauge in-line using a T-fitting.
  8.  
  9. Start the engine and measure the fuel pressure.
  10.  
  11. Release the fuel system pressure and remove the gauge.
  12.  

 
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