Fuel Delivery System: Removal & Installation Kia Optima I рестайлинг

REPLACEMENT

1. Reduce the internal pressure of the fuel lines and hoses and perform the following operations. Disconnect the fuel pump harness connector in the trunk room. Start the engine and, after it stops, turn the ignition switch to OFF. Disconnect the battery negative (-) terminal. Connect the fuel pump harness connector.
2. Remove the two fitting nuts while holding the fuel filter nuts securely.
3. Remove the fuel filter mounting bolts, and then remove the fuel filter from the fuel filter clamp. Tightening torque Fuel filter fitting nut: 25-35 Nm (250-350 kg. cm, 18-25 Ib. ft)

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1. Reduce the internal pressure of the fuel pipes and hoses by using the following procedures. Open the trunk door and disconnect the fuel pump harness connector in the trunk room. Start the engine and after it stalls, turn the ignition switch to the OFF position. Disconnect the battery negative (-) terminal. Connect the fuel pump harness connector.
2. Remove the bolt connecting the fuel line to the fuel delivery pipe. WARNING: Cover the hose connection with a shop towel to prevent splashing of fuel caused by fuel residual pressure in the fuel line.
3. Using the fuel pressure gauge adapter, install the fuel-pressure gauge to the fuel pressure gauge adaptor. Tighten the bolt to the specified torque. Fuel pressure gauge to fuel delivery pipe: 25-35 Nm (250-350 kg. cm, 18-26 lb. ft)
4. Connect the battery's negative (-) terminal.
5. Apply battery voltage to the terminal for the pump drive and activate the fuel pump: then, with fuel pressure applied, check that there is no fuel leakage from the pressure gauge or connection part.
6. Start and run the engine at curb idle speed.
7. Disconnect the vacuum hose from the pressure regulator, and plug the hose end. Measure the fuel pressure at idle. Standard value : 320-340 kPa (3.26-3.47 kg/cm 2 , 46-49 psi)
8. Measure the fuel pressure when the vacuum hose is connected to the pressure regulator. Standard value : Approx. 255 kPa (2.57 kg/cm 2 , 37 psi)
9. If the results of the measurements made in steps (7) and (8) are not within the standard value, use the table in the following illustration to determine the probable cause, and make the necessary repairs.
10. Stop the engine and check for a change in the fuel pressure gauge reading, which should hold for approximately 5 minutes. If the gauge indication drops, observe the rate of drop. Determine and remove the causes according to the following illustration.
11. Reduce the pressure in the fuel line.
12. Disconnect the hose and the gauge. WARNING: Cover the hose connection with a shop towel to prevent splashing of fuel caused by fuel residual pressure in the fuel line.
13. Replace the O-ring at the end of the hose.
14. Connect the fuel hose to the delivery pipe and tighten to specification.
15. Check for fuel leakage.

REMOVAL

1. Release residual pressure from the fuel line to prevent fuel spilling. WARNING: Cover the hose connection with rags to prevent splashing of fuel that could be caused by residual pressure in the fuel line.
2. Remove the delivery pipe with the fuel injector and pressure regulator.

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1. Install a new grommet and O-ring to the injector.
2. Apply a coating of solvent, spindle oil or gasoline to the injector O-ring.
3. While turning the injector to the left and right, install it on to the delivery pipe.
4. Be sure the injector turns smoothly. NOTE: If injector does not turn smoothly, the O-ring may be jammed. Remove the injector and re-insert it into the delivery pipe and re-check.

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1. Remove the fuel tank cap to lower the fuel tank's internal pressure.
2. Open the trunk door and disconnect the fuel pump connector, remove the fuel feed and return line from the fuel pump assembly.
3. Remove the fuel pump installation screws, then remove the fuel pump assembly from the fuel tank.
4. Remove the fuel sender from the fuel pump assembly.
5. Inspect and replace, if necessary.

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INSTALLATION

1. Install the fuel vapor hose and return hoses. If the fuel line has a stepped section, connect the fuel hose to the line securely, as shown in the illustration. If the fuel line does not have a stepped section, connect the fuel hose to the line securely.

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