Ignition Timing: Inspection

WARNING: This page is about a different variant/trim than selected.

CAUTION: After warming-up, engine becomes very hot. Be careful not to burn yourself during measurement.

Warm-up the engine.
To check the ignition timing, connect a timing light to #1 cylinder spark plug cord, and illuminate the timing mark with the timing light.
Start the engine at idle speed and check the ignition timing.
Ignition timing [BTDC/rpm]:

MT vehicle: 10°±8°/650

AT vehicle: 15°±8°/700

Fig 1: Checking Ignition Timing
Courtesy of SUBARU OF AMERICA, INC.

If the timing is not correct, check the ignition control system.

Refer to Engine Control System. < Ref. to BASIC DIAGNOSTIC PROCEDURE . >