Fuel Injector Balance Test - With Special Tool

Injector Balance Test Example (Typical):

INJECTOR BALANCE TEST EXAMPLE (TYPICAL)

TEST DESCRIPTION

Steps 1-3:

Steps 4-9:

The numbers below refer to the step numbers on the diagnostic table.
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. The fuel pressure should be within the specified range with the fuel pump running.
6. The fuel pressure should reach a steady value and stabilize after the fuel pump is turned OFF.
7. If the pressure drop value for each fuel injector is within 10 kPa (1.5 psi) of the average pressure drop value, this indicates that the fuel injectors are flowing properly. Calculate the pressure drop value for each fuel injector by subtracting the second pressure reading from the first pressure reading. Refer to the example above.