Kia Optima: Release Residual Pressure in Fuel Line - Repair procedures - Fuel Delivery System - Engine Control/Fuel System - Kia Optima TF 2011-2020 Service ManualKia Optima: Release Residual Pressure in Fuel Line

Whenever the high pressure fuel pump, fuel pipe, delivery pipe, or injector is removed immediately after shutting off the engine, an injury may be caused by the release of highly pressurized fuel. Release the residual pressure in the high pressure fuel line by referring to the "Residual fuel pressure release procedure" below before removing any high pressure fuel system components.

Wear safety glasses and fuel resistant gloves.

1. Turn the ignition off and disconnect the battery negative cable.
2. Remove the fuel pump relay (A).

3. Disconnect the electrical connector from the high pressure fuel pump.
4. Reconnect the battery negative cable.
5. Run the engine for about 20 seconds to lower the pressure in both the high or low pressurelines. The engine may shut off within the 20 second period. If not, turn the engine off.
6. Proceed with the service or repair. Use rags to cover opening and catch spills when opening up the high pressure system.
7. Reinstall / re-connect all components in reverse order of removal. Start engine and confirm proper operation, and make sure there are no fuel leaks.
8. After completing, clear DTC(s) using GDS scan tool (the procedure described above will cause DTC to set).

Fuel Pressure Test
1. Release the residual pressure in fuel line (Refer to Release Residual Pressure in Fuel Line in this group). ...

Fuel Tank. Repair procedures
...

See also:

Line Pressure Control Solenoid Vale. Description and Operation
Description Line pressure control solenoid valve is attached to the valve body. This variable force solenoid valve directly controls the hydraulic pressure inside the line pressure. ...

Trunk Lid Repair procedures
Replacement Trunk Lid Assembly Replacement     • When removing and installing the trunk lid, an assistant is necessary. • Wear gloves to protect hands ...

The Importance of Using Safety Belts
There are four very important reasons to use safety belts even with an air bag supplemental restraint system. They: help keep you in the proper position (away from the air bag) when it inflates. ...

Copyright www.kiopman.com 2020