Kia Optima Hybrid: Engine Control System / Injector Repair procedures

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual / Engine Control/Fuel System / Engine Control System / Injector Repair procedures

Inspection

1.	Turn the ignition switch OFF.

2.	Disconnect the injector connector.

3.	Measure resistance between the injector terminals 1 and 2.

Check that the resistance is within the specification.

Specification: 13.8 ~ 15.2? [20°C(68°F)]

Removal

1.	Turn the ignition switch OFF and disconnect the battery negative (-) terminal.

2.	Release the residual pressure in fuel line (Refer to “Release Residual Pressure in Fuel Line” in this group).

3.	Disconnect the injector connector (A).

4.	Remove the wiring harness bracket installation bolt (B).

5.	Remove the mounting nut, and then disconnect the fuel feed tube (C).

6.	Remove the mounting bolt (D), and then remove the delivery pipe & injector assembly from the engine.

7.	Remove the fixing clip (A), and then separate the injector from the delivery pipe.

Installation

•	Install the component with the specified torques.

•	Note that internal damage may occur when the component is dropped. In this case, use it after inspecting.

•	Apply the engine oil to the injector O-ring.

•	Inspect the injector O-ring when installing.

Install in the reverse order of removal.

Delivery pipe mounting bolt:

18.6 ~ 23.5 N.m (1.9 ~ 2.4 kgf.m, 13.7 ~ 17.4 lb-ft)

Delivery pipe mounting nut (- Fuel feed tube):

7.8 ~ 9.8 N.m (0.8 ~ 1.0 kgf.m, 5.8 ~ 7.2 lb-ft)

Injector Schematic Diagrams

Circuit Diagram ...

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