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Home >> Chevrolet >> 2009 >> HHR SS, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Controls And Fuel - 2.2L Or 2.4L - Troubleshooting & Diagnosis) >> Fuel Injector Diagnosis (w/CH47976) >> Component Testing >> AFIT Test Procedure

AFIT Test Procedure

WARNING: This page is about a different variant/trim than selected.
    IMPORTANT: DO NOT perform the AFIT Test Procedure if the ECT is above 60°C (150°F). High fuel pressure readings may result due to hot soak fuel boiling. With the engine OFF, the fuel pressure may increase to the setting of the pressure relief regulator valve, 550 kPa ± 5 percent (80 psi ± 5 percent).
    IMPORTANT: Verify that adequate fuel is in the fuel tank before proceeding with this diagnostic.
  1. Turn OFF all accessories.
  2. Turn OFF the ignition.
  3. Install the AFIT. Refer to the AFIT User Guide.
  4. Turn ON the AFIT and select the vehicle.
  5. Turn ON the ignition and perform the Injector Test.
  6. View the test results.
    • If any injector exceeds the recommended tolerance, replace the injectors.
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