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Home >> Mazda >> 2007 >> RX-8 Touring, 1.3 3 >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> Fuel System >> Fuel Injector Inspection >> Injection volume Inspection

Injection volume 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. (See BATTERY REMOVAL/INSTALLATION )
  3. Remove the PCM.(See PCM REMOVAL/INSTALLATION )
  4. Connect the PCM connector.
  5. Remove the fuel injector and fuel distributor as a single unit. (See FUEL INJECTOR REMOVAL/INSTALLATION ).
  6. Fix the fuel injector to the fuel distributor with a wire or the equivalent.
  7. Connect the appropriate fuel injector connector.
    Fig 1: Connecting Appropriate Fuel Injector Connector
    G04562860Courtesy of MAZDA MOTORS CORP.
  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. 
  9. Ground the check connector terminal F/P using the jumper wire.
  10. Turn the ignition switch to the ON position and operate the fuel pump.
    CAUTION:
    • Shorting the wrong terminal of the PCM may cause malfunctions. Make sure to short only the specified terminal. 
      Fig 2: Locating Check Connector
      G04562820Courtesy of MAZDA MOTORS CORP.
  11. Ground the following PCM terminal using the jumper wire, and then measure the injection volume of each fuel injector.
    • If not within the specification, replace the fuel injector.
      Fig 3: Identifying PCM Wiring Harness - Side Connector Terminal
      G04562862Courtesy of MAZDA MOTORS CORP.
    INJECTION VOLUME CHART

    Engine Fuel injector Injection volume (approx.) (cm3 {cc, fl oz}/15s)
    Position Color
    13B-MSP (Standard Power) FP1, RP1 Red 69-78 {69-78, 2.4-2.6}
    FS, RS Blue 118-133 {118-133, 4.00-4.50}
    13B-MSP (High Power) FP1, RP1 Red 69-78 {69-78, 2.4-2.6}
    FP2, RP2, FS, RS Yellow 89-101 {89-101, 3.01-3.42}
    FUEL INJECTOR AND PCM TERMINALS

    Fuel injector PCM terminal
    Fuel injector (FP1) 2M
    Fuel injector (RP1) 2J
    Fuel injector (FS) 2G
    Fuel injector (RS) 2D
    Fuel injector (FP2) 3A
    Fuel injector (RP2) 3D
  12. Turn the ignition switch to the LOCK position and disconnect the jumper wire.
  13. Inspect all parts by performing the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE ).
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