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Home >> Mitsubishi >> 1999 >> Eclipse RS, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Controls - On-Vehicle Adjustments >> Ignition Timing >> Checking Ignition Timing >> All Other Models
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All Other Models

  1. Ignition timing is controlled by Powertrain Control Module (PCM) and is not adjustable. Manufacturer provides procedure for checking timing. On models with distributor, DO NOT attempt to adjust ignition timing by rotating distributor.
  2. Connect scan tool to Data Link Connector (DLC). DLC is located below dash, near steering column. See Figure. Install a timing light. Start engine and allow it to idle.
  3. Using scan tool, read curb idle speed (RPM). Ensure curb idle speed is about 750 RPM. Turn engine off. Curb idle speed is automatically controlled by Idle Air Control (IAC) system. If curb idle speed is not as specified, see DTC P0505 in appropriate SELF-DIAGNOSTICS article.
  4. Using scan tool, select MFI SYSTEM ACTUATOR TEST, then select item 17 (BASIC IGNITION TIMING). Read basic ignition timing value. See IGNITION TIMING SPECIFICATIONS .
  5. If basic ignition timing is within specification, go to next step. If basic ignition timing is not within specification, inspect timing belt, timing belt cover and crankshaft position sensor for proper installation. Also check for DTCs. See SELF-DIAGNOSTICS - INTRODUCTION article. Repair as necessary. Go to next step.
    6. CAUTION: MFI system actuator test must be cancelled or test will continue to run for 27 minutes. Driving vehicle under this condition may damage engine.
  6. Cancel MFI system actuator test. Read actual ignition timing value. Actual ignition timing may fluctuate by 7 degrees. At high altitude, actual ignition timing may be further advanced.
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