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Home >> Subaru >> 1994 >> Justy DL >> Repair and Diagnosis >> Engine Performance >> Engine Controls - Adjustments >> Idle Speed & Mixture >> Idle Speed

Idle Speed

  1. Ensure ignition timing is correct. Ensure vacuum hoses, blow-by hoses, rocker arm cover, oil cap, and other components connected to intake system are securely attached.
  2. Warm engine and oxygen sensor by operating engine at 2500 RPM for about one minute after engine reaches normal operating temperature. Disconnect and plug canister purge hose at check valve (near intake manifold).
  3. Connect both ends of test mode and read memory connectors. See Figure . Set transaxle in Neutral (M/T) or Park (A/T) position. Start engine. Rotate idle speed screw to adjust idle speed to 650-750 RPM. See Fig 1 . Unplug both test mode and read memory connector ends.
Fig 1: Locating Idle Speed Screw
G93D79171Courtesy of SUBARU OF AMERICA, INC.
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