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Idle Speed & Ignition Timing

Verify idle speed and ignition timing are set to specification. See IDLE SPEED SPECIFICATIONS  and IGNITION TIMING  tables. For adjustment procedures, see ON-VEHICLE ADJUSTMENTS article.

IDLE SPEED SPECIFICATIONS

Application RPM
All Models
With A/C Off 600-800
With A/C On 800-900
IGNITION TIMING (1) (Degrees BTDC @ RPM)

Application Auto. Trans. Man. Trans.
Forester 15 @ 700 15 @ 700
Impreza & Outback Sport
2.2L (California) 15 @ 700 15 @ 700
2.2L (Federal) 15 @ 700 10 @ 700
2.5L 15 @ 700 10 @ 700
Legacy
2.2L (California) 15 @ 700 15 @ 700
2.2L (Federal) 15 @ 700 10 @ 700
2.5L 15 @ 700 15 @ 700
(1) To improve stability, timing is controlled while engine is idling. Timing range is plus or minus 8 degrees (all vehicles).
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