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Home >> Mazda >> 2005 >> 3 i, Standard >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> Fuel System >> Fuel Injector Inspection >> Leakage Inspection

Leakage 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 "BEFORE SERVICE PRECAUTION" before performing any work operations to prevent fuel from spilling from the fuel system. (See BEFORE SERVICE PRECAUTION )
  2. Disconnect the negative battery cable.
  3. Remove the fuel injector and fuel distributor as a single unit. (See FUEL INJECTOR REMOVAL/INSTALLATION )
  4. Fix the fuel injector to the fuel distributor with a wire or the equivalent.
    Fig 1: Securing Fuel Injectors To Fuel Distributor
    G03635918Courtesy of MAZDA MOTORS CORP.
  5. Connect the fuel hose.
  6. Start the fuel pump using the following procedure:

    Using WDS or equivalent 

    1. Connect the WDS or equivalent to the DLC-2.
      Fig 2: Identifying DLC-2 Connector
      G03635865Courtesy of MAZDA MOTORS CORP.
    2. Start the fuel pump using the "FP" simulation function.

    Not using WDS or equivalent 

    1. Remove the fuel pump relay.
      CAUTION:
      • Be careful to short the specified terminal as shorting the wrong terminal of the main fuse block may cause a malfunction.
      Fig 3: Identifying Fuel Pump Relay
      G03635864Courtesy of MAZDA MOTORS CORP.
    2. Using a jumper wire, short fuel pump relay terminals C and D and connect the negative battery cable to start the fuel pump.
    Fig 4: Jumping Fuel Pump Relay Terminals C And D
    G03635867Courtesy of MAZDA MOTORS CORP.
  7. Tilt the fuel injector at an angle of 60  ° to inspect for leakage.
    • If not within the specification, replace the fuel injector.

    Standard 

    1. Less than 1 drop/2 min 
    Fig 5: Tilting Fuel Injectors To 60°
    G03635922Courtesy of MAZDA MOTORS CORP.
  8. Stop the fuel pump using the following procedure:

    Using WDS or equivalent 

    1. Stop the fuel pump using the "FP" simulation function.

    Not using WDS or equivalent 

    1. Disconnect the negative battery cable to stop the fuel pump.
  9. Disconnect the negative battery cable. (using WDS or equivalent)
  10. Remove the wire or equivalent securing the fuel injector.
  11. Install the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION )
  12. Inspect all related parts by performing "AFTER SERVICE PRECAUTION". (See AFTER SERVICE PRECAUTION )
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