Kia Forte: Fuel Pressure Test

Kia Forte: Fuel Pressure Test - Fuel Delivery System - Engine Control / Fuel System - Kia Forte TD 2014-2018 Service ManualKia Forte: Fuel Pressure Test

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.
Install the Special Service Tool (SST).
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.
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).

Inspect fuel leakage on connections among the fuel feed tube, the delivery pipe, and the SST components with IG ON.
Measure Fuel Pressure.
Start the engine and measure the fuel pressure at idle.
Fuel Pressure: 323 363 kPa (3.3 3.7 kgf/cm², 46.9 52.6 psi)
  
If the fuel pressure differs from the standard value, repair or replace the related part (Refer to the table below).

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

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
Fuel Pressure Drops Slowly
Leakage on injector
Injector
Fuel Pressure Drops Immediately
Check valve of fuel pump stuck open
Fuel Pump

Turn the ignition switch OFF.
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.
Test End
Remove the Special Service Tool (SST) from the fuel feed tube and the delivery pipe.
Connect the fuel feed tube and the delivery pipe.

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  • Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test

    Kia Forte: Fuel Pressure Test