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Home >> Honda >> 2004 >> Pilot EX >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Supply System >> Fuel Pressure Test >> Special Tools Required
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Special Tools Required

  1. Make sure you have the anti-theft codes for the radio and the navigation system, then write down the frequencies for the radio's preset buttons.
  2. Disconnect the negative cable from the battery.
  3. Remove the fuel fill cap.
  4. Remove the intake manifold cover (see INTAKE MANIFOLD REMOVAL & INSTALLATION ).
  5. Place a wrench on the fuel pulsation damper (A).
    Fig 1: Placing A Wrench On The Fuel Pulsation Damper
    G01464168Courtesy of AMERICAN HONDA MOTOR CO., INC.
  6. Place a rag or shop towel (B) over the fuel pulsation damper.
  7. Slowly loosen the fuel pulsation damper one complete turn.
  8. Remove the fuel pulsation damper from its fitting, and attach the fuel pressure gauge attachment.
    Fig 2: Removing The Fuel Pulsation Damper From Its Fitting
    G01464169Courtesy of AMERICAN HONDA MOTOR CO., INC.
  9. Attach the fuel pressure gauge.
    Fig 3: Attaching The Fuel Pressure Gauge
    G01464170Courtesy of AMERICAN HONDA MOTOR CO., INC.
  10. Reconnect the negative cable to the battery, then start the engine, and let it idle.
    • If the engine starts, go to step  12.
    • If the engine does start, go to step 11.
  11. Check to see if the fuel pump is running: listen to the injector rails underneath the intake manifold cover while an assistant turns the ignition switch ON (II). You should hear the fuel flow through the injector rails for about 2 seconds when the ignition switch is turned ON (II).
    • If the pump runs, go to step 12.
    • If the pump does not run, test it (see Fuel Pump Test  ).
  12. Read the pressure gauge. The pressure should be 330-382 kPa (3.4-3.9 kgf/cm2 , 48-56 psi).
    • If the pressure is OK and engine is running, the test is complete. If the engine is not running, repair the cause, then continue this test.
    • If the pressure is too high, check for a pinched or clogged fuel return hose or line.
    • If the pressure is too low, check for a clogged fuel filter and for leaks in the fuel lines.
    • If the pressure is out of spec and the fuel lines are OK, replace the pressure regulator (see Fuel Pressure Regulator Replacement  ).
    13. NOTE: Disassemble and clean the fuel pressure gauge attachment thoroughly after use.
  13. Remove the pressure gauge, and reinstall the fuel pulsation damper with a new washer. Tighten the fuel pulsation damper to 22 N.m (2.2kgf.m, 16 lbf.ft).
  14. Install the intake manifold cover (see INTAKE MANIFOLD REMOVAL & INSTALLATION ).
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