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HOMESERVICE MANUALSACURA2009MDXREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMPGM-FI SYSTEMINJECTOR REPLACEMENT
2009 Acura MDX

Injector Replacement

2009 Acura MDXSECTION Injector Replacement
  1. Relieve the fuel pressure (see FUEL PRESSURE RELIEVING ).
  2. Remove the intake manifold (see REMOVAL ).
  3. Disconnect the connectors from the injectors (A).
    Fig 1: Injectors And Fuel Rail Mounting Bolts And Nut With Torque Specifications
    G05485121Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Disconnect the quick-connect fitting (B).
  5. Remove the fuel rail mounting bolts (C) and nut (D) from the fuel rails (E).
  6. Remove the injector clips (F) from the fuel rail.
  7. Remove the injectors from the rails.
  8. Coat the new O-ring (A) with clean engine oil, and insert the injectors (B) into the fuel rails (C).
    Fig 2: Identifying Injectors To Fuel Rails And O-Ring With Clean Engine Oil
    G05485122Courtesy of AMERICAN HONDA MOTOR CO., INC.
  9. Install the injector clips (D).
  10. Coat the new injector O-ring (E) with clean engine oil.
  11. Install the injectors in the injector base.
  12. Install the fuel rail mounting bolts and nut.
  13. Install the injector connectors.
  14. Connect the quick-connect fitting (see FUEL LINE/QUICK-CONNECT FITTING PRECAUTIONS ).
  15. Turn the ignition switch ON (II), but do not operate the starter. After the fuel pump runs for about 2 seconds, the fuel pressure in the fuel line rises. Repeat this two or three times, then check for fuel leakage.
  16. Install the intake manifold.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.