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Home >> Mitsubishi >> 1994 >> Eclipse Base, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Controls - Adjustments >> Idle Speed & Mixture >> Basic Idle Speed >> 2.0L
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Basic Idle Speed: 2.0L

  1. Insert paper clip or appropriate probe into tachometer connector. See TACHOMETER CONNECTOR LOCATION  table. Connect a primary voltage detecting type tachometer to paper clip.
  2. On all models with 16-pin DLC connector, connect a jumper wire between data link terminal No. 1 and vehicle ground. See Figure . On all models with 12-pin DLC connector, connect a jumper wire between data link connector terminal No. 10 and vehicle ground. See Figure .
  3. Connect a jumper wire between ignition timing adjustment connector and vehicle ground. See IGNITION TIMING ADJUSTMENT CONNECTOR LOCATION  table under IGNITION TIMING.
  4. Start and run engine at idle. Check basic idle speed. See IDLE SPEED SPECIFICATIONS  table. If idle speed is not within specification, turn engine speed adjusting screw until correct engine speed is obtained. See Figure . Access to speed adjusting screw is obtained by removing rubber plug on throttle body.
  5. If idle speed cannot be lowered by turning engine speed adjusting screw, determine if fixed speed adjusting screw (stop screw contacting throttle lever) has been adjusted. See FIXED SPEED ADJUSTING SCREW  for procedure.
  6. After all adjustments are verified correct, possible cause of incorrect idle speed is deterioration of fast idle air control motor. Throttle valve must be replaced to correct symptom. Disconnect jumper wires and recheck idle speed.
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