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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 244 (ENGINE CONTROLS - SYSTEM & COMPONENT TESTING - 6.0L W/BiFuel & CNG) >> Fuel Systems >> Fuel Injector Coil Test >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Savana, 2003 Chevrolet Silverado, and 2003 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

The number below refers to step number in diagnostic procedure.

  1. 3  - This step tests each fuel injector resistance within a specific temperature range. If any of the fuel injectors display a resistance outside of the specified value, replace the fuel injector.
  2. 4  - This step determines if all of the fuel injectors are within 0.5 ohm of each other. If the highest resistance value is within 0.5 ohm of the lowest resistance value, then all of the fuel injector coil windings are okay.
  3. 5  - This step determines which fuel injector is faulty. After subtracting the highest and lowest resistance values from the average value, replace the fuel injector that has the greatest resistance difference from the average.

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