Hyundai Kona: Fuel Delivery System / Repair procedures
| 1. |
Release the residual pressure in fuel line (Refer to "Release Residual
Pressure in Fuel Line" in this group).
| •
|
When removing the fuel pump relay, the Diagnostic Trouble
Code (DTC) will be occurred. Therefore delete the code
with the GDS after "Release Residual Pressure in Fuel
Line" work.
|
|
|
| 2. |
Install the Special Service Tool (SST).
| (1) |
Disconnect the fuel feed tube from the delivery pipe.
|
• |
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 fuel feed tube and the fuel delivery pipe (Refer
to the figure below).
|
|
| 3. |
Inspect fuel leakage on connections among the fuel feed tube, the delivery
pipe, and the SST components with IG ON.
|
| 4. |
Measure Fuel Pressure
| (1) |
Start the engine and measure the fuel pressure at idle.
|
Fuel Pressure :
480 - 520 kPa (4.9 - 5.3 kgf/cm, 69.6 - 75.4 psi)
|
|
• |
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 valve 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 open stuck
|
Fuel Pump
|
|
| (3) |
Turn the ignition switch OFF.
|
|
| 5. |
Release the residual pressure in fuel line.
(Refer to Fuel Delivery System - "Release Residual Pressure in Fuel
Line")
| •
|
When removing the fuel pump relay, the Diagnostic Trouble
Code (DTC) will be occurred. Therefore delete the code
with the GDS after "Release Residual Pressure in Fuel
Line" work.
|
|
|
| 6. |
Test End
| (1) |
Remove the Special Service Tool (SST) from the fuel feed tube
ant the delivery pipe.
|
| (2) |
Connect the fuel feed tube and the delivery pipe.
|
|
| Release Residual Pressure
in Fuel Line |
| • |
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.
|
|
| 1. |
Turn the ignition switch OFF and disconnect the battery (-) cable.
|
| 2. |
Remove the fuel pump fuse (A).
| •
|
When removing the fuel pump relay, the Diagnostic Trouble
Code (DTC) will be occurred. Therefore delete the code
with the GDS after "Release Residual Pressure in Fuel
Line" work.
|
|
|
| 3. |
Connect the battery (-) cable.
|
| 4. |
Start the engine and let idle, and then turn the ignition switch OFF
after the engine has stopped on its own.
|
| 5. |
Disconnect the battery (-) cable, and then install the fuel pump relay
(A).
|
| 6. |
Connect the battery (-) cable.
|
| 7. |
Delete the Diagnostic Trouble Code (DTC) related the fuel pump relay
with the GDS.
|
Component Location
[Fuel Tank]
1. Fuel tank
2. Fuel pump
3. Fuel filter
4. Fuel pressure regulator
5. Canister
6. Fuel tank air filter
...
Removal
1.
Release the residual pressure in fuel line.
(Refer to Fuel Delivery System - "Release Residual Pressure in Fuel
Line")
...
Other information:
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Description
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Hyundai Kona (OS) 2018-2024 Owners Manual: Fuel filler door
Opening the fuel filler door
The fuel filler door must be opened from inside the vehicle by pulling up on
the fuel-filler door opener.
1. Turn the engine off.
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3. Pull the fuel filler door (1) out to fully open.
4. To remove the ...
Components and components location
Fuel Tank Repair procedures