Fuel Delivery/fault Isolation: Removal & Installation Kia Optima I рестайлинг

FUEL SENDER AND FUEL FILTER REPLACEMENT [2.7 V6]

1. Remove the fuel tank cap to lower the tank's internal pressure.
2. Disconnect the harness connector from the fuel sender.
3. Remove the fuel tank module installation screws, and then remove the fuel sender assembly from the fuel tank.

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1. Turn the ignition switch to OFF.
2. Apply battery voltage to the fuel pump drive connector to check that the pump operates. NOTE: The fuel pump is an in-tank type and its operating sound is hard to hear without removing the fuel tank cap.
3. Pinch the fuel hose to check that fuel pressure is felt.

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1. Reduce the internal pressure of the fuel pipes and hoses by the following procedures. Disconnect the fuel pump harness connector after removing the rear seat cushion. 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 filter. 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 filter. Tighten the bolt to the specified torque. Fuel pressure gauge to fuel filter : 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 below 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 table. PROBABLE CAUSE Condition Probable cause Remedy Fuel pressure drops slowly after engine is stopped . Injector leakage . Replace injector Fuel pressure drops immediately after engine is stopped . The check valve within the fuel pump is open . Replace fuel pump
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 of the end of the hose.
14. Connect the fuel hose to the delivery pipe and tighten with the specified.
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.

Scheme 66