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Home >> Mazda >> 2004 >> RX-8 1.3 3 >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> Fuel System >> Fuel Pump Unit Inspection >> Hold Pressure Inspection

Hold Pressure Inspection

WARNING:
  • Fuel line spills and leakage from the pressurized fuel system are dangerous. Fuel can ignite and cause serious injury or death and damage. To prevent this, complete the following inspection with the engine stopped.
  1. Follow the before repair procedure and perform the fuel line safety procedure. (See BEFORE REPAIR PROCEDURE .)
  2. Disconnect the negative battery cable.
  3. Disconnect the engine compartment-side quick release connector. (See QUICK RELEASE CONNECTOR REMOVAL/INSTALLATION .)
  4. Turn the SST  lever so that it is 90°  to the hose and then plug the outlet of the SST. 
    Fig 1: Reconnecting Quick Release Connector Special Tool To Fuel Pipe
    G01345768Courtesy of MAZDA MOTORS CORP.
  5. Reconnect the quick release connector of the SST  to the fuel pipe until a click is heard.
  6. Verify that the quick release connector is firmly connected by pulling it by hand.
  7. Prevent the fuel spillage by placing the fuel hose outlet (rubber hose) of the SST  into a container
  8. Connect the negative battery cable.
    CAUTION:
    • Shorting the wrong terminal of the check connector may cause malfunctions. Make sure to short only the specified terminal.
    Fig 2: Connecting Check Connector Terminal F/P To Body
    G01345769Courtesy of MAZDA MOTORS CORP.
  9. Ground the check connector terminal F/P using the jumper wire.
  10. Turn the ignition switch to the ON position for 10 min  and then operate the fuel pump.
  11. Measure the fuel pressure 5 min  after turning the ignition switch to the LOCK position.
    • If not within the specification, inspect the following: 
      • Fuel filter clogging (low-pressure side and high-pressure side)
      • Fuel line clogging or leakage

    Standard 

    200 kPa {2.0 kgf/cm 2  , 29 psi} or more 

  12. Disconnect the jumper wire.
  13. Follow the before repair procedure and practice the fuel line safety procedure. (See BEFORE REPAIR PROCEDURE .)
  14. Disconnect the SST. 
  15. Connect the quick release connector. (See QUICK RELEASE CONNECTOR REMOVAL/INSTALLATION .)
  16. Inspect all parts by performing the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE .)