Kia Forte BD Quiz
Engine Control System/Fuel System

Fuel Delivery System

In this manual: Engine Control System/Fuel System
General Information — 8Maintenance — 32Engine Mechanical System — 47Engine Electrical System — 17Emission Control System — 10Engine Control System/Fuel System — 32Clutch System — 11Manual Transmission — 11DCT (Dual Clutch Transmission) System — 16Drive Shaft and Axle — 8Suspension System — 26Steering — 9Restraints — 11Brake System — 27Body (Interior and Exterior) — 119Body Electrical System — 98Heating, Ventilation, and Air Conditioning — 27
14steps
~89min
5/5difficulty
1special tools
Done 0 of 14

Components and Component Location

Component Location

Fuel Tank and Filler Neck Assembly

1. Fuel Tank
2. Fuel Pump
3. Fuel Pump Plate Cover
4. Fuel Hose		 5. Equalizing Tube
6. Vapor Port [Fuel Pump (Canister) → Intake Manifold]
7. Vapor Hose [Fuel Pump (Canister) → Atmosphere]
8. Filler Neck Assembly

Fuel pump

1. Head Assembly
2. Fuel Pressure Regulator
3. Fuel Filter
4. Fuel Pump Motor
5. Fuel Pre-Filter		 6. Reservoir Cup
7. Fuel Level Sensor
8. Fuel Pump Motor and Fuel Level Sensor Connector
9. Vapor Port [Fuel Pump ↔ Canister]
10. Fuel Feed Port

[High-Pressure Fuel Pipe]

1. High-pressure fuel pump
2. High-pressure fuel pipe		 3. Delivery pipe
4. Injector

Circuit Diagrams

Schematic Diagrams

Fuel Pressure Inspection (Low-Pressure System)

Fuel Pressure Inspection (Low-Pressure System)

  1. Release the residual pressure in the fuel line.

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

  2. Install the Special Service Tool (SST).

    1. Disconnect the fuel feed hose from the injection pipe.

    2. Install the special service tool for measuring fuel pressure between the fuel feed hose and the fuel feed pipe (refer to the illustration below).

      • For 09353-02100

      • For 0K353-D4100

  3. With the ignition ON, inspect for fuel leaks at the connections between the low-pressure fuel feed pipe, the high-pressure fuel pump low-pressure inlet, and the SST components.

  4. Measure the fuel pressure.

    1. Start the engine and measure fuel pressure at idle.

      Fuel pressure: More than 500 kPa (more than 5.0 bar, more than 5.09 kgf/cm², more than 72.51 psi)

      Fuel
      Pressure      		 Cause Related Part
      Too low Clogged fuel filter Fuel filter
      Fuel leakage Fuel Pressure Regulator
      Too high Fuel pressure regulator stuck Fuel Pressure Regulator

    2. Stop the engine, and then check the fuel pressure gauge for pressure change.

      Specification: The fuel pressure gauge reading should be maintained for approximately 5 minutes after the engine is stopped.

      Fuel Pressure
      (After Engine Stop)      		 Cause Related
      Part
      Fuel pressure drops slowly Injector leakage Injector
      Fuel pressure drops immediately Fuel pump check valve stuck open Fuel pump

    3. Turn the ignition off.

  5. Release the residual pressure in the fuel line.

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

  6. End of test

    1. Remove the Special Service Tool (SST) from the low pressure fuel feed hose and the low pressure inlet of the high pressure fuel pump.

    2. Connect the low-pressure fuel feed tube and the hose to the low-pressure inlet of the high-pressure fuel pump.

Release Residual Fuel Line Pressure

Release Fuel Line Residual Pressure

  1. Turn the ignition switch OFF and disconnect the negative (-) battery cable.

  2. Remove the fuel pump fuse (A).

  3. Connect the negative (-) battery terminal.

  4. Start the engine and let it idle.

  5. Turn the ignition switch OFF after the engine stops on its own.

  6. Disconnect the negative (-) battery cable, and then install the fuel pump fuse (A).

  7. Connect the negative (-) battery terminal.

  8. Clear the Diagnostic Trouble Code (DTC) related to the fuel pump fuse using the KDS.

Test yourself

A quick Kia Forte BD quiz: every answer comes with an explanation and a link to the manual page.