Fuel Pressure Test

WARNING: This page is about a different car, the 2006 Acura MDX, 2005 Acura MDX, 2004 Acura MDX, and 2003 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

Special Tools Required

Fuel pressure gauge 07406-004000A
Fuel pressure gauge set 07AAJ-S6MA150

Relieve the fuel pressure (see FUEL PRESSURE RELIEVING ).
Disconnect the quick-connect fitting (A). Attach the fuel pressure gauge set and the fuel pressure gauge.

Fig 1: Disconnecting Quick-Connect Fitting (2003-04 Models)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 2: Disconnecting Quick-Connect Fitting (2005-06 Models)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Start the engine, and let it idle.
- If the engine starts, go to step 5.
- If the engine does not start, go to step 4.
Check to see if the fuel pump is running: listen to the fuel fill port with the fuel cap removed. The fuel pump should run for 2 seconds when the ignition switch is first turned on.
- If the pump runs, go to step 5.
- 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 390-440 kPa (4.0-4.5 kg/cm² , 57-64 psi).
- If the pressure is OK and the engine is running, the test is complete. If the engine is not running, repair the cause, then continue this test.
- If the pressure is out of specification and the fuel lines are OK, replace the pressure regulator (see FUEL PRESSURE REGULATOR REPLACEMENT ).