Kia Optima: Removal - High Pressure Fuel Pump. Repair procedures - Fuel Delivery System - Engine Control/Fuel System - Kia Optima TF 2011-2024 Service ManualKia Optima: Removal

In case of removing the high pressure fuel pump, high pressure fuel pipe, delivery pipe, and injector, there may be injury caused by leakage of the high pressure fuel. So dont do any repair work right after engine stops.

1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2. Release the residual pressure in fuel line (Refer to Release Residual Pressure in Fuel Line in this group).
When removing the fuel pump relay, a Diagnostic Trouble Code (DTC) may occur.

Delete the code with the GDS after completion of Release Residual Pressure in Fuel Line work.

3. Remove the air cleaner and the air intake hose (Refer to Intake And Exhaust System in EM group).
4. Disconnect the fuel pressure regulator valve connector (A).
5. Remove the ignition coil (B).

6. Disconnect the fuel feed tube quick-connector (A).
7. Remove the high pressure fuel pipe.
(1) Remove the installation nut (B) from the high pressure fuel pump with the special service tool [SST No.: 09314-3Q100]

(2) Remove the installation nut (C) from the delivery pipe with the special service tool [SST No.: 09314-3Q100]
(3) Remove the purge control solenoid valve (Refer to Purge Control Solenoid Valve in this group).
(4) Remove the function block (D), and then remove the high pressure fuel pipe.
8. Remove the installation bolts (E), and then remove the high pressure fuel pump from the cylinder head assembly.
Unscrew in turn the two bolts in small step (0.5 turns). In case of fully unscrewing one of the two bolts with the other bolt installed, the housing surface of the cylinder head may be broken because of tension of the pump spring.


High Pressure Fuel Pump. Repair procedures
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