AFIT Test Procedure
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Turn OFF all accessories.
- Turn OFF the ignition.
- Install the AFIT. Refer to the AFIT User Guide.
- Turn ON the AFIT and select the vehicle.
- Turn ON the ignition and perform the Injector Test.
- If the AFIT aborts testing due to fuel pressure or fuel leak down, refer to Fuel System Diagnosis (w/o FPCM) or Fuel System Diagnosis (w/FPCM) .
- View the test results.
- If any injector exceeds the recommended tolerance, replace the injector(s), E-85 only. All other engine, refer to Fuel Injector Cleaning .