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Home >> Mercury >> 2002 >> Villager Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Diagnostic Procedures >> Idle Speed & Ignition Timing >> Idle Speed
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Idle Speed

  1. Ensure all vehicle accessories are off and front wheels are straight. Apply parking brake. Ensure transmission is in Neutral or Park. Connect scan tool to Data Link Connector (DLC) and start engine. Using scan tool, monitor ECT and RPM PIDs.
    2. NOTE: Ensure engine cooling fan is not operating at time of idle speed adjustments.
  2. Loosen cold idle adjust nut and turn cold idle adjust screw to align fast idle cam cold mark with cam follower lever roller while ECT PID reads 66-86°F (20-30°C). Tighten cold idle adjust nut.
    3. NOTE: When engine coolant reads 167-185°F (75-85°C), fast idle cam warm mark should align without touching cam lever follower.
  3. Loosen base idle adjust nut and turn base idle adjust screw to adjust idle speed while ECT PID reads 167-185°F (75-85°C) and RPM PID reads 650-750 RPM. Tighten base idle adjust nut. Turn air conditioning on. Place A/C control in MAX position and blower fan control in HI position. Make sure idle speed is more than 800 RPM.
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