Fuel Pressure Test

Special Tools Required

Fuel pressure gauge 07406-004000A
Fuel pressure gauge attachment 07VAJ-0040100

Make sure you have the anti-theft code for the radio, then write down the frequencies for the radio's preset buttons.
Disconnect the negative cable from the battery.
Remove the fuel fill cap and the engine cover.
Use a wrench on the fuel pulsation damper (A) at the fuel rail.

Fig 1: Using A Wrench On Fuel Pulsation Damper
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Place a rag or shop towel (B) over the fuel pulsation damper.
Slowly loosen the fuel pulsation damper one complete turn.
Remove the fuel pulsation damper from its fitting, and attach the fuel pressure gauge attachment.

Fig 2: Removing Fuel Pulsation Damper From Its Fitting
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Attach the fuel pressure gauge.

Fig 3: Attaching Fuel Pressure Gauge
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Start the engine and let it idle.
- If the engine starts, go to step 11 .
- If the engine does not start, go to step 10.
Check to see if the fuel pump is running: listen to the fuel fill port with the fuel fill cap removed. The fuel pump should run for 2 seconds when the ignition switch is first turned ON (II).
- If the pump runs, go to step 11.
- If the pump does not run, do the fuel pump circuit troubleshooting (see Fuel Pump Circuit Troubleshooting ).
Read the pressure gauge. The pressure should be 330-380 kPa (3.4-3.9 kgf/cm² , 48-55 psi).
- If the pressure is OK, the test is complete.
- If the pressure is out of specification, replace the fuel pressure regulator (see Fuel Pressure Regulator Replacement ) and the fuel filter (see Fuel Pressure Regulator Replacement ), then repeat the test.
Remove the pressure gauge, and reinstall the fuel pulsation damper with a new washer. Tighten the fuel pulsation damper to 22 N.m (2.2 kgf.m, 16 Ft.Lbs.).
NOTE: Disassemble and clean the fuel pressure gauge attachment thoroughly after use.