Pressure Testing (Civic, CV-R & Prelude)
- Disconnect negative battery terminal. Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE . On Civic, remove 12-mm banjo bolt. On Prelude, remove the sealing nut on fuel rail. On all models, connect Fuel Pressure Gauge (07406-0040001) and Fuel Pressure Gauge Adapter (90201-P0A-003). Reconnect negative battery terminal. Disconnect vacuum hose from fuel pressure regulator and pinch return line closed. Start engine, and read fuel pressure. If engine starts, go to next step. If engine will not start, turn ignition on, wait for 2 seconds, turn ignition off, then on again and read fuel pressure.
- With engine idling, reconnect vacuum hose to fuel pressure regulator and release fuel return line. Read fuel pressure. Both gauge readings should be within specification. See REGULATED FUEL PRESSURE table. If fuel pressure readings are within specification, go to next step. If fuel pressure is higher than specified, check for pinched or clogged fuel return hose or defective fuel pressure regulator. If fuel pressure is lower than specified, check for clogged fuel filter, defective fuel pressure regulator or fuel line leakage.
- Relieve fuel pressure and remove gauge. On Civic, tighten 12-mm banjo bolt to 25 ft. lbs. (33 N.m). On Prelude, tighten 12-mm sealing nut to 16 ft. lbs. (22 N.m). Start engine and check for leaks.
REGULATED FUEL PRESSURE
| Application | At Idle psi (kg/cm2 ) | ||
|---|---|---|---|
| Accord | |||
| 2.3L | |||
| Vacuum Hose Disconnected & Pinched | 47-54 (3.3-3.8) | ||
| Vacuum Hose Connected | 38-46 (2.7-3.2) | ||
| 3.0L | |||
| Vacuum Hose Disconnected & Pinched | 41-48 (2.9-3.4) | ||
| Vacuum Hose Connected | 32-40 (2.3-2.8) | ||
| Civic | |||
| B16A2 Engine | |||
| Vacuum Hose Disconnected & Pinched | 40-47 (2.8-3.3) | ||
| Vacuum Hose Connected | 30-37 (2.1-2.6) | ||
| Except B16A2 Engine | |||
| Vacuum Hose Disconnected & Pinched | 38-46 (2.7-3.2) | ||
| Vacuum Hose Connected | 28-36 (2.0-2.5) | ||
| CR-V | |||
| Vacuum Hose Disconnected & Pinched | 40-47 (2.8-3.3) | ||
| Vacuum Hose Connected | 31-38 (2.2-2.7) | ||
| Odyssey & SLX | |||
| Vacuum Hose Disconnected & Pinched | 41-48 (2.9-3.4) | ||
| Vacuum Hose Connected | 32-40 (2.3-2.8) | ||
| Prelude | |||
| Vacuum Hose Disconnected & Pinched | 40-47 (2.8-3.3) | ||
| Vacuum Hose Connected | 30-37 (2.1-2.6) | ||