Ignition Timing - Subaru 2009 IMPREZA Service Manual

MECHANICAL

4. Ignition Timing

A: INSPECTION
CAUTION:
After warming-up, engine becomes very hot. Be
careful not to burn yourself at measurement.
1) Before checking the ignition timing, check the
following item:
(1) Check the air cleaner element is free from
clogging, spark plugs are in good condition, and
hoses are connected properly.
(2) Check the malfunction indicator light does
not illuminate.
2) Warm up the engine.
3) Stop the engine, and turn the ignition switch to
OFF.
4) Connect the timing light to #1 cylinder spark plug
cord, and then light the timing mark with the timing
light.
5) Start the engine and check the ignition timing at
idle speed as shown below.
Ignition timing [BTDC/rpm]:
15° 8°/700 (AT model)
10° 8°/650 (MT model)
If the timing is not correct, check the ignition control
system. <Ref. to EN(H4SO)(diag)-2, Basic Diag-
nostic Procedure.>
Ignition Timing
ME-02676
ME(H4SO)-24