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Hyundai Accent: Repair procedures - Fuel Delivery System - Engine Control/Fuel SystemHyundai Accent: Repair procedures

Hyundai Accent RB (2010-2018) Service Manual / Engine Control/Fuel System / Fuel Delivery System / Repair procedures

Fuel Pressure Test

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, 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 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:
429 ~ 469 kPa (4.38 ~ 4.79 kgf/cm², 62.3 ~ 68.1 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 stuck open
Fuel Pump

(3)
Turn the ignition switch OFF.
5.
Release the residual pressure in fuel line (Refer to “Release Residual Pressure in Fuel Line”).
6.
Test End
(1)
Remove the Special Service Tool (SST) from the fuel feed tube and the delivery pipe.
(2)
Connect the fuel feed tube and the delivery pipe.

Components and Components Location
Components Location 1. Fuel Tank 2. Fuel Pump 3. Fuel Filter 4. Fuel Pressure Regulator 5. Canister 6. Fuel Tank Band 7. Fuel Filler Hose 8. Ventilatio ...

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 ...

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