Optima V6-2.7L (2003)
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/Square cm, 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/Square cm, 37 psi)
Condition/Probable Cause
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.
