Idle Speed: Inspection

1. Before checking the idle speed, check the following:
   1. Ensure the air cleaner element is free from clogging, ignition timing is correct, spark plugs are in good condition, and hoses are connected properly.
   2. Ensure the malfunction indicator light does not illuminate.
2. Idle the engine.
3. Stop the engine, and turn the ignition switch to OFF.
4. When using Subaru Select Monitor, refer to the following. < Ref. to , SPECIAL TOOL , PREPARATION TOOL, General Descriptions
   1. Insert the cartridge to the Subaru Select Monitor.
   2. Connect the Subaru Select Monitor to data link connector.
      Fig 1: Inserting Cartridge To Subaru Select Monitor

      Courtesy of SUBARU OF AMERICA, INC.
   3. Turn the ignition switch to ON, and Subaru select monitor switch to ON.
   4. Select {Each System Check} in the Main Menu.
   5. Select {Engine} in the Selection Menu.
   6. Select {Current Data Display & Save} in the Engine Control System Diagnosis.
   7. Select {Data Display} in the Data Display Menu.
   8. Start the engine, and read engine idle speed.
5. When using the tachometer (Secondary pick-up type):
   1. Attach the pick-up clip to No. 1 cylinder spark plug cord.
   2. Start the engine, and read engine idle speed.
   Fig 2: Attaching Pick-Up Clip To No. 1 Cylinder Spark Plug Cord

   Courtesy of SUBARU OF AMERICA, INC.
   NOTE: This ignition system provides simultaneous ignition for #1 and #2 plugs. It must be noted that some tachometers may register twice that of actual engine speed.
6. Check the idle speed when unloaded. (With headlights, heater fan, rear defroster, radiator fan, A/C, etc. OFF)

   Idle speed [No load and gears in "N" or "P" range]: 

   650+/-100 rpm 

7. Check the idle speed when loaded. (Turn the A/ C switch to "ON" and operate the compressor for at least one minute before measurement.)

Idle speed [A/C "ON" and gears in "N" or "P" range]: 

800+/-100 rpm