Sonata GL V6-3.0L (1997)
5. Apply battery voltage to the fuel pump drive terminal, 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 the engine and let it idle.
7. Disconnect the vacuum hose from the pressure regulator and plug the hose end. Measure the fuel pressure at idle.
Fuel pressure: 320-340 kPa (46-49 psi)
8. Measure the fuel pressure when the vacuum hose is connected to the pressure regulator.
Fuel pressure Approximately: 270 kPa (39 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 the probable causes and repair them according to the following table.
11. Reduce the fuel pressure in the fuel line.
Fuel Pressure Gauge And Adapters
