ENGINE COMPRESSION
Check engine compression at normal operating temperature with all spark plugs removed. To prevent damage to catalytic converter, make tests quickly and only when necessary.
Note. Compression specifications are not supplied by manufacturer. Difference between cylinders must not exceed 29 psi.
VALVE CLEARANCE (2.0L & 2.3L)
Note. Information for 3.0L is not available from manufacturer.
All models are equipped with hydraulic lifters, normal maintenance is not required. Checking valve clearance requires the use of Saab special service tool No. (83 93 753) and assumes the cylinder head is off the vehicle, and camshafts and tappets are removed. (Scheme 1) To increase valve clearance, valve stem must be shortened and to decrease valve clearance, valve seat must be reground.
Scheme 1
IGNITION COIL
Trionic Engine Management System uses an ignition discharge module that houses all ignition coils. Resistance values are not available from manufacturer. For diagnostic testing procedures, see appropriate SELF-DIAGNOSTICS article.
SPARK PLUGS
| Application | Spark Plug | |
|---|---|---|
| 9-3 Series | NGK PFR 6H-10 | |
| 9-5 Series | ||
| 2.3L (170 bhp) | NGK BCPR 6ES-11 | |
| 2.3L (230 bhp) | NGK PFR 6H-10 | |
| 3.0L | NKG BKR 7ES-11 | |
SPARK PLUG TYPE
| Application | Gap - In. (mm) | |
|---|---|---|
| 9-3 | 0.037 (0.95) | |
| 9-5 | ||
| 2.3L (170 bhp) & 3.0L | 0.041 (1.05) | |
| 2.3L (230 bhp) | 0.037 (0.95) | |
| (1) Tighten to 18.5-21.5 ft. lbs. (25-29 N.m). | ||
| (1) | Tighten to 18.5-21.5 ft. lbs. (25-29 N.m). |
SPARK PLUG SPECIFICATIONS (1)
FIRING ORDER
Note. For firing order (Scheme 2)and (Scheme 3).
Scheme 2
Scheme 3
IGNITION TIMING
Trionic Engine Management System measures spark plug resistance to control ignition timing, eliminating the need for Camshaft Position (CMP) sensor and Knock Sensor (KS). Ignition timing is controlled by ECM and is not adjustable.
FUEL PUMP
| Application | Pressure psi (kg/cm 2 ) |
|---|---|
| All Models | 43 (3.0) |
FUEL SYSTEM REGULATED PRESSURE AT IDLE
INJECTOR RESISTANCE
| Application | (1) Ohms |
|---|---|
| All Engines | 15.15-16.75 |
| (1) Resistance measured at 68°F (20°C). | |
| (1) | Resistance measured at 68°F (20°C). |
INJECTOR RESISTANCE
THROTTLE/PEDAL POSITION SENSORS
Throttle valve position is entirely controlled by ECM unless a serious throttle control fault occurs. Then limp-home solenoid activates and throttle is controlled by throttle cable. Trionic engine management system uses 2 throttle position sensors and 2 pedal position sensors. None are adjustable. If opening throttle by hand while engine is running, use pedal position sensor arm instead of throttle spindle to open throttle. Otherwise, fuel shutoff occurs and diagnostic trouble code (DTC) P1263 sets. If done while cranking, DTC P1251 sets and system goes into limp-home mode. If either DTC sets, go to appropriate SELF-DIAGNOSTICS article for diagnostic procedures.
| Sensor/Position | Pins No. | (1) Voltage | |
|---|---|---|---|
| Throttle Position Sensor No. 1 | |||
| Closed | 6-9 | 0.065-1.090 | |
| Open | 6-9 | 3.930-4.775 | |
| Throttle Position Sensor No. 2 | |||
| Closed | 8-9 | 3.910-4.935 | |
| Open | 8-9 | 0.025-1.070 | |
| Pedal Position Sensor No. 1 | |||
| Released | 1-9 | 3.990-4.645 | |
| Depressed | 1-9 | 0.400-1.055 | |
| Pedal Position Sensor No. 2 | |||
| Released | 3-9 | 0.355-1.010 | |
| Depressed | 3-9 | 3.945-4.600 | |
| (1) Ignition switch on, backprobe sensor harness connector. | |||
| (1) | Ignition switch on, backprobe sensor harness connector. |
THROTTLE/PEDAL POSITION SENSOR VOLTAGES