Pressure Testing
- Relieve fuel pressure. See FUEL SYSTEM PRESSURE RELEASE . Connect Fuel Pressure Gauge (07406-0040001). On Integra and 3.5RL, connect at fuel filter service bolt. On 3.2 TL, remove pulsation damper and connect gauge in it's place. Reconnect negative battery cable. Start engine and allow to idle. Disconnect and plug 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.
- 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 . If fuel pump is okay, go to next step.
- If fuel pressure is higher than specified, check for pinched or clogged fuel return hose and line between fuel rail and fuel tank. If fuel return hose and line are okay, check fuel pressure regulator. Repair as necessary. Ensure system is operating properly.
- 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.
REGULATED FUEL PRESSURE
| Application |
At Idle W/O Vacuum - psi (kg/cm2
) |
At Idle W/ Vacuum - psi (kg/cm2
) |
| Integra |
| B18B1 Engine |
40-47 (2.8-3.3) |
36-43 (2.5-3.0) |
| B18C1 & B18C5 Engines |
47-54 (3.3-3.8) |
38-46 (2.7-3.2) |
| 3.2TL |
41-48 (2.9-3.4) |
32-40 (2.2-2.7) |
| 3.5RL |
43-51 (3.0-3.6) |
35-42 (2.5-3.0) |