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Home >> Pontiac >> 2002 >> Aztek AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Fuel System (Bi-Fuel & CNG) >> Fuel Injector Coil Test (Bi-Fuel & CNG) >> Test Description
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Test Description

The numbers below refer to step numbers in diagnostic procedures.

  1. 3

    This step tests each fuel injector resistance within a specific temperature range. If any fuel injectors display a resistance outside of specified value, replace fuel injector.

  2. 4

    This step determines if all fuel injectors are within.5 ohms of each other. If highest resistance value is within.5 ohms of lowest resistance value, then all fuel injector coil windings are okay.

  3. 5

    This step determines which fuel injector is faulty. After subtracting highest and lowest resistance values from average value, replace fuel injector that has greatest resistance difference from average.

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