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Home >> Subaru >> 1995 >> Legacy Base >> Repair and Diagnosis >> Engine Performance >> Engine Controls - Adjustments >> Idle Speed & Mixture >> Idle Speed
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Idle Speed

  1. Ensure air filter is clean, vacuum hoses are properly routed, and timing is correct. Warm engine to operating temperature. Connect inductive pick-up tachometer to No. 1 spark plug wire.
    NOTE: Because spark plugs No. 1 and 2 fire simultaneously, some tachometers may register twice actual engine speed.
  2. Measure idle speed with all accessories off, then with all accessories on. See IDLE SPEED SPECIFICATIONS table. If idle speed is not as specified, check self-diagnostic system for trouble codes. Repair as necessary. See the TESTS W/CODES article.
IDLE SPEED SPECIFICATIONS

Application RPM
Accessories Off 600-800
Accessories On 800-900
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