Test Description

The numbers below refer to step numbers in diagnostic procedure.

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 3 ohms of each other. If highest resistance value is within 3 ohms of lowest resistance value, then all fuel injector coil windings are okay.
3. 6  - This step determines if the ignition 1 voltage circuit under the intake plenum is causing the concern.
4. 8  - 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.