FUEL INJECTOR INSPECTION [AJ (3.0L Duratec)]

id0114a1800700

Fuel Injector Operation Inspection

Warning
• Fuel can ignite and cause death or serious injury, and damage. To prevent this, always make sure to follow the warnings and cautions for each procedure when repairing or inspecting.

STEP

INSPECTION

RESULT

ACTION

1
Is there fuel injector operation sound from each cylinder while cranking? (Use a soundscope or equivalent tool.)
Yes
The fuel injector operation system is normal.
No
If it cannot be verified at all cylinders, go to Step 2.
If it cannot be verified at specific cylinders, go to Step 3.
2
Is the main relay operation normal?
Yes
Perform the following inspection.
• Wiring harnesses and connectors related to fuel injector power supply system
• PCM connector
• Fuel injector ground and related wiring harnesses and connectors
No
Replace the main relay.
3
Remove the fuel injector where the operation sound cannot be verified, install it to the connector where the operation sound is verified, and then crank the engine again.
Is there operation sound?
Yes
Go to the next step.
No
Replace the fuel injector.
4
Is the wiring harness or connector normal? (Open or short circuit)
Yes
Inspect for the applicable fuel injector PCM terminal voltage.
No
Repair or replace.

Leakage Inspection

Warning
• Fuel line spills and leakage from the pressurized fuel system are dangerous. To prevent this, complete the following inspection with the engine stopped.

1. Perform the 'Fuel Line Safety Procedure' referring to the BEFORE SERVICE PRECAUTION. (See BEFORE SERVICE PRECAUTION [AJ (3.0L Duratec)].)

2. Disconnect the negative battery cable.

3. Remove the fuel injector and fuel distributor as a single unit. (See FUEL INJECTOR REMOVAL/INSTALLATION [AJ (3.0L Duratec)].)

4. Fix the fuel injector to the fuel distributor with a wire or the equivalent.

5. Connect the fuel hose.

6. Connect the negative battery cable.

7. Turn the ignition switch to the ON position.

8. Connect the WDS or equivalent to the DLC-2.

9. Using the "FP" simulation function, verify the fuel pump operation sound when the fuel pump relay is turned from off to on.

10. Tilt the fuel injectors 60 × and inspect for the fuel leakage.

• If it is not within the specification, replace the fuel injector.
Standard
1 drop or less/2 min

11. Turn the ignition switch to the LOCK position and stop the fuel pump.

12. Inspect all parts by performing the AFTER SERVICE PRECAUTION. (See AFTER SERVICE PRECAUTION [AJ (3.0L Duratec)].)