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Home >> Mercury >> 1998 >> Villager LS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing 3.0L >> Idle Speed & Ignition Timing >> Ignition Timing
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Ignition Timing

  1. Ensure engine is at operating temperature, all accessories are off, and transmission is in Park or Neutral. Set parking brake. Ensure idle speed is correct.
  2. Connect timing light to No. 1 spark plug wire. Disconnect Idle Air Control (IAC) wiring harness connector. Start engine. Check base ignition timing. See IGNITION TIMING table.
  3. If timing is not to specification, loosen distributor hold-down bolt. Adjust timing as necessary. Turn engine off. Reconnect IAC harness connector. Start engine. Ensure advance mechanism functions when engine speed is increased.
IGNITION TIMING

Application Degrees BTDC
Villager (1) 13-17
(1) With IAC solenoid connector unplugged.
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