1986 Mercury Lynx Base, MTXIIFACTORY OEM SERVICE PROCEDURE

Curb Idle Speed

  1. Place transmission in neutral. Bring engine to normal operating temperature, and stop. Remove timing hole cover. Clean flywheel surface, and install reflective tape.
  2. Idle is measured with manual transmission in neutral. Check curb idle speed, using Rotunda Tachometer (099-00001). Check curb idle speed as compared to that speed listed on the vehicle emissions control information decal.
  3. Adjust to specification by loosening lock nut on idle speed bolt. Turn idle speed adjusting bolt clockwise to increase or counterclockwise to decrease idle. See Fig 1 .
    Fig 1: Adjusting Curb Idle
    G5402
  4. Tighten lock nut. Place transmission in neutral. Rev engine momentarily and recheck curb idle RPM. Readjust if necessary. Turn A/C on (If equipped). Check idle speed. Adjust to specification by loosening lock nut on A/C throttle kicker and rotating adjusting screw. See Fig 1 .
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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