Optima L4-2.4L (2001)
8. Measure the fuel pressure when the vacuum hose is connected to the pressure regulator.
Standard value Approx. 255 kPa (2.57 kg/sq.cm, 37 psi)
9. If the results of the measurements made in steps (7) and (8) are not within the standard value, use the table 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.
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.
