Fuel Injector Balance Test

1. First Reading 2. Second Reading:

Test Description
4. The engine coolant temperature must be below the operating temperature in order to avoid irregular fuel pressure readings due to Hot Soak fuel boiling.
5. This step checks that the fuel pressure is within the specified range. If the fuel pressure is not within the specified range, refer to Fuel System Diagnosis.
6. This step checks for a steady fuel pressure reading. If the fuel pressure reading indicated is not steady, refer to Fuel System Diagnosis. System Diagnosis - Fuel System
7. The fuel injectors are flowing properly if the pressure drop value for each fuel injector is within 10 kPa (1.5 psi) of the average pressure drop value. Calculate the pressure drop value for each fuel injector by subtracting the second pressure reading from the first pressure reading. Refer to the examples in the preceding table.