Subaru Impreza 2003 Service Manual page 240

MECHANICAL
4. Ignition Timing
A: INSPECTION
CAUTION:
After warming up, engine becomes very hot. Be
careful not to burn yourself during measure-
ment.
1) Warm up the engine.
2) To check the ignition timing, connect a timing
light to #1 cylinder spark plug cord, and illuminate
the timing mark with timing light.
3) Start the engine at idle speed and check the ig-
nition timing.
Ignition timing [BTDC/rpm]:
1.6 L model:
With OBD: 5 °± °± °± °± 10 ° ° ° ° /650
Without OBD: 5 °± °± °± °± 10 ° ° ° ° /700
2.0 L model:
With OBD: 10 °± °± °± °± 10 ° ° ° ° /650
Without OBD: 10 °± °± °± °± 10 ° ° ° ° /700
2.5 L model:
10 °± °± °± °± 10 ° ° ° ° /650
If the timing is not correct, check the ignition control
system.
Refer to Engine Control System. <Ref. to
EN(H4SO)-2, Basic Diagnostic Procedure.>
IGNITION TIMING
ME-00194
ME(H4SO)-28