Fuel Pressure Testing: 3.5RL
- Relieve fuel pressure. See FUEL SYSTEM PRESSURE RELEASE
. Connect Fuel Pressure Gauge (07406-0040001) at fuel filter service bolt. See Fig 1
. Reconnect negative battery cable. Start engine and allow to idle. Disconnect and clamp fuel pressure regulator vacuum hose. Observe fuel pressure on gauge. See REGULATED FUEL PRESSURE
table. If vehicle will not start, turn ignition switch on, wait 2 seconds, turn ignition off and then back on and observe fuel pressure.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
- Ensure manifold vacuum is present at fuel pressure regulator vacuum hose. Reconnect fuel pressure regulator vacuum hose with engine at idle. Observe fuel pressure on gauge. See REGULATED FUEL PRESSURE
table. If fuel pressure is not as specified, check fuel pump. See FUEL PUMP CIRCUIT TESTING
. If fuel pump is okay, go to next step.
- If fuel pressure is higher than specified, check for pinched or clogged fuel return hose or line between fuel rail and fuel tank. If fuel pressure is lower than specified, check for plugged fuel filter, faulty fuel pressure regulator or leakage in fuel line. Repair as necessary. Ensure system is operating properly and go to next step.
- Turn ignition off. Relieve fuel pressure. See FUEL SYSTEM PRESSURE RELEASE
. Reconnect vacuum hose to fuel pressure regulator. Remove fuel gauge. Reinstall fuel filter service bolt using NEW washers and tighten to 106 INCH lbs. (12 N.m).