Fuel Injector Balance Test With Special Tool

CIRCUIT

Fuel Injector Balance Test With Special Tool:

Fuel Injector Balance Test Example (Typical):

TEST DESCRIPTION

Steps 1 - 3:

Steps 4 - 5:

Step 6:

Steps 7 - 8:

The numbers below refer to the step numbers on the diagnostic table.
3. The engine coolant temperature (ECT) must be below the operating temperature in order to avoid irregular fuel pressure readings due to hot soak fuel boiling.
6. If the pressure drop value for each fuel injector is within 10 kPa (1.5 psi) of the average pressure drop value, 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 illustration.