Sonata GL V6-25L (1999) Fuel Pump Fuel Pressure Specs
5. Connect the fuel feed hose to the Fuel Pressure Gauge Adaptor (09353-38000)
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 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 end of the hose. Measure the fuel pressure at idle.
Standard value:
320 - 340 kPa (3.26 - 3.47 kg/sq.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/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 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.
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.
