ENGINE COMPRESSION
| Application | Specification |
|---|---|
| Compression Ratio | 9.5:1 |
| Compression Pressure (1) (2) | 156-185 psi (11.0-13.0 kg/cm 2 ) |
| (1) @ 200-300 RPM. (2) Max. Variation Between Cylinders is 28 psi (2.0 kg/cm 2 ). | |
| (1) | @ 200-300 RPM. |
| (2) | Max. Variation Between Cylinders is 28 psi (2.0 kg/cm 2 ). |
COMPRESSION SPECIFICATIONS
VALVE CLEARANCE
Note. Vehicle uses hydraulic lash adjusters; adjustments are not required.
IGNITION COIL
| Application | Primary | Secondary |
|---|---|---|
| A/T | 0.63-0.77 | 10,400-15,600 |
| M/T | 0.62-0.76 | 17,900-24,500 |
IGNITION COIL RESISTANCE - OHMS @ 68°F (20°C)
HIGH TENSION WIRE RESISTANCE
| Application | Ohms |
|---|---|
| No. 1 | 4950-11,560 |
| No. 2 | 4860-11,330 |
| No. 3 | 4950-11,560 |
| No. 4 | 5240-12,230 |
HIGH TENSION WIRE RESISTANCE
SPARK PLUGS
| Application | NGK | Nippondenso |
|---|---|---|
| Impreza | BKR6E-11 | (1) |
| (1) Not specified by manufacturer. | ||
| (1) | Not specified by manufacturer. |
SPARK PLUG TYPE
| Application | Gap In. (mm) | Torque Ft. Lbs. (N.m) |
|---|---|---|
| Impreza | .039-.043 (1.0-1.1) | 15 (20) |
SPARK PLUG SPECIFICATIONS
FIRING ORDER & TIMING MARKS
Note. For firing order (Scheme 1) For timing marks (Scheme 2)
Firing Order & Distributor Rotation. Scheme 1
Scheme 2
IGNITION TIMING
| Application | Auto. Trans. | Man. Trans. |
|---|---|---|
| Impreza | 12-28 @ 700 | 18-22 @ 700 |
IGNITION TIMING (Degrees BTDC @ RPM)
FUEL PUMP
Note. Fuel pump performance measures fuel pressure and volume availability, not regulated fuel pressure.
| Application | Pressure psi (kg/cm 2 ) | Min. Vol. In 30 Sec. Pts. (L) |
|---|---|---|
| Impreza | 36 (2.5) | 1.4 (0.7) |
FUEL PUMP PERFORMANCE
| Application | At Idle psi (kg/cm 2 ) |
|---|---|
| Impreza | 26-30 (1.8-2.1) |
REGULATED FUEL PRESSURE
INJECTOR RESISTANCE
| Application | Ohms |
|---|---|
| Impreza | 11-12 |
INJECTOR RESISTANCE SPECIFICATIONS
IDLE SPEED & MIXTURE
| Application | RPM |
|---|---|
| With Accessories Off | 600-800 |
| With Accessories On | 800-900 |
IDLE SPEED SPECIFICATIONS
FAST IDLE SPEED
Note. Fast idle speed is not available from manufacturer. See the ADJUSTMENTS article for adjustment procedure.
THROTTLE POSITION (TP) SENSOR
Note. See the ADJUSTMENTS article for Throttle Position (TP) sensor adjustment procedure.