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Home >> Subaru >> 1991 >> XT Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Idle Speed & Ignition Timing

Idle Speed & Ignition Timing

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Ensure idle speed and ignition timing are set to specification. For adjustment procedures, see the ADJUSTMENTS article in the ENGINE PERFORMANCE Section.

IDLE SPEED SPECIFICATIONS

Application RPM
1.8L PFI
Non-Turbo 600-800
Turbo 700-900
1.8L TBI 500-600
2.2L
Accessories Off 600-800
Accessories On 800-900
2.7L 650-850
IGNITION TIMING (Degrees BTDC @ RPM)

Application Man. Trans. Auto Trans.
1.8L
Non-Turbo 20 @ 700 20 @ 700
Turbo 20 @ 800 20 @ 800
2.2L
Non-Turbo 18-22 @ 700 12-28 @ 700
Turbo 7-23 @ 700 7-23 @ 700
2.7L 20 @ 750 20 @ 750