Release the residual pressure in fuel line (Refer to the Fuel
Delivery System - Repair Procedures - "Release Residual Pressure in
Fuel Line").
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.
2.
Install the Special Service Tool (SST).
(1)
Disconnect the low pressure fuel feed tube from the low pressure inlet of high pressure fuel pump.
There may be some residual pressure even after “Release
Residual Pressure in Fuel Line” work, so cover the hose connection
with a shop towel to prevent residual fuel from spilling out before
disconnecting any fuel connection.
(2)
Install the special service tool for measuring the fuel
pressure in between the low fuel feed tube and the low pressure inlet of
high pressure fuel pump (Refer to the figure below).
3.
Inspect fuel leakage on connections among the low fuel feed
tube, the low pressure inlet of high pressure fuel pump, and the SST
components with IG ON.
4.
Measure Fuel Pressure.
(1)
Start the engine and measure the fuel pressure at idle.
If the fuel pressure differs from the standard value, repair or replace the related part (Refer to the table below).
Fuel Pressure
Cause
Related Part
Too Low
Fuel filter clogged
Fuel Filter
Fuel leakage
Fuel Pressure Regulator
Too High
Fuel pressure regulator stuck
Fuel Pressure Regulator
(2)
Stop the engine, and then check for the change in the fuel pressure gauge reading.
Standard Value: The gauge reading should hold for about 5 minutes after the engine stops
If the gauge reading should not be held, repair or replace the related part (Refer to the table below).
Fuel Pressure (After Engine Stops)
Cause
Related Part
Fuel Pressure Drops Slowly
Leakage on injector
Injector
Fuel Pressure Drops Immediately
Check valve of fuel pump stuck open
Fuel Pump
(3)
Turn the ignition switch OFF.
5.
Release the residual pressure in fuel line (Refer to the Fuel
Delivery System - Repair Procedures - "Release Residual Pressure in
Fuel Line").
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.
6.
Test End
(1)
Remove the Special Service Tool (SST) from the low pressure
fuel feed tube and the low pressure inlet of high pressure fuel pump.
(2)
Connect the low pressure fuel feed tube and the low pressure inlet of high pressure fuel pump.
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).
Components Location
1. Fuel tank2. Fuel pump3. Fuel filter4. Fuel pressure regulator5. Canister6. Fuel tank air filter7. Fuel tank band 8. Fuel tank pressure sensor (FTPS) 9. Canister close ...
Removal
1.
Release the residual pressure in fuel line (Refer to the Fuel
Delivery System - Repair Procedures - "Release Residual Pressure in
Fuel Line").
2.
Remove the rear seat cushion (R ...
Valve Body: Description and Operation
Description
The valve body is essential to automatic transaxle control
and consists of various valves used to control the oil feed from the oil
pump. Specifically, these valves consist of press ...
Kia Sportage: Repair procedures
Components and Components Location
Fuel Tank: Repair procedures