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Hyundai Tucson: Fuel Tank

Hyundai Tucson - Fourth generation (NX4) - (2020-2023) - Workshop Manual / Engine Control - Fuel System / Fuel Delivery System - Fuel Tank / Fuel Tank

Component Location

  1. Fuel tank
  2. Canister
  3. Vapor hose
  4. Ventilaton hose
  5. Fuel filler hose
  6. Fuel tank air filter
  7. Leveling hose
  8. Fuel Level Sender (FLS)
  9. Fuel pump
  10. Fuel filter
  11. Fuel pressure regulator
  12. Fuel Perssure Sensor (FPS)

High Pressure Fuel Line

  1. High Pressure Fuel Pump
  2. High Pressure Fuel Pipe
  3. Delivery Pipe
  4. Injector

WARNING

In case of removing the high pressure fuel pump, high pressure fuel pipe, delivery pipe, and injector, there may be injury caused by leakage of the high pressure fuel. So don't do any repair work right after engine stops.

Fuel Pressure Test

  1. Release the residual pressure in fuel line.

(Refer to Fuel Delivery System - "Release Residual Pressure in Fuel Line")

WARNING

When removing the fuel pump relay, the Diagnostic Trouble Code (DTC) will be occurred. Therefore delete the code with the diagnostic tool after "Release Residual Pressure in Fuel Line" work.

  1. Install the Special Service Tool (SST).

(1) Disconnect the fuel feed tube from the delivery pipe.

WARNING

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).

  1. Inspect fuel leakage on connections among the fuel feed tube, the delivery pipe, and the SST components with IG ON.
  2. 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)

WARNING

If the fuel pressure differs from the standard value, repair or replace the related part (Refer to the table below).

(2) Stop the engine, and then check for the change in the fuel pressure gauge

(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

WARNING

If the gauge reading should not be held, repair or replace the related part (Refer to the table below).

(3) Turn the ignition switch OFF.

(3) Turn the ignition switch OFF.

  1. Release the residual pressure in fuel line.

(Refer to Fuel Delivery System - "Release Residual Pressure in Fuel Line")

WARNING

When removing the fuel pump relay, the Diagnostic Trouble Code (DTC) will be occurred. Therefore delete the code with the diagnostic tool after "Release Residual Pressure in Fuel Line" work.

  1. 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.

    READ NEXT:

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