2000-2003 M/T models

1. Relieve the fuel pressure (see FUEL PRESSURE RELIEVING  ).
2. Remove the sealing nut from the fuel rail. Attach the fuel pressure adapter nut, 12 mm (A) and the fuel pressure gauge.
   Fig 1: Attaching Fuel Pressure Adapter Nut And Fuel Pressure Gauge

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
3. Disconnect the vacuum hose (C) from the fuel pressure regulator (D), and pinch it closed with a clamp (E).
4. Start the engine, and let it idle.
   • If the engine starts, go to step  6 .
   • If the engine does not start, go to step 5.
5. Check to see if the fuel pump is running: Remove the fuel fill cap, and hold your ear to the fuel fill port while an assistant turns the ignition switch ON (II). You should hear the pump run for about 2 seconds when the ignition is turned ON (II).
   • If the fuel pump runs, make sure there is sufficient fuel in the tank, then go to step 6.
   • If the fuel pump does not run, test it (see FUEL PUMP TEST  ).
6. Read the pressure gauge (with the fuel pressure regulator vacuum hose disconnected and clamped). The pressure should be 270-320 kPa (2.8-3.3 kgf/cm² , 40-47 psi).
   • If the pressure is OK and engine is running, go to step  8 . If the engine is not running, repair the cause, then continue this test.
   • If the pressure is out of spec, go to step  8 .
7. With the engine running, un-pinch and reconnect the vacuum hose, and read the gauge again. The pressure should be 210-260 kPa (2.1-2.6 kgf/cm² , 30-37 psi).
   • If the fuel pressure is OK, go to step  9 .
   • If the pressure is out of specification, go to step 8.
8. Disconnect the vacuum hose from the pressure regulator again while you watch the pressure gauge. The pressure should rise when you disconnect the hose.
   • If the pressure did not rise, replace the fuel pressure regulator (see FUEL PRESSURE REGULATOR REPLACEMENT  ).
   • If the pressure rose, but all your readings were lower than specified, check for a clogged fuel filter and for leaks in the fuel lines.
   • If the pressure rose, but all your readings were higher than specified, check for a pinched or clogged fuel return hose or line.
9. Reconnect the vacuum hose, remove the pressure gauge, and reinstall the sealing nut with a new washer. Tighten the sealing nut to 22 N.m (2.2kgf.m, 16 lbf.ft).
   NOTE: Disassemble and clean the fuel pressure gauge attachment thoroughly after use.

Special Tools Required 

Fuel pressure gauge 07406-004000B