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Spark Output Check

  1. Check EEC-IV system for fault codes and repair if necessary. See QUICK TEST in G - EEC IV TESTS W/CODES article in the ENGINE PERFORMANCE Section. If no fault codes are retrieved, check ignition system wiring harness connectors for corrosion and tight fit. Repair or replace as necessary.
  2. If wiring and connectors are okay, use Neon Bulb Spark Tester (D89P-6666-A) to check for spark at each spark plug wire while cranking engine. If spark is consistent and equal at each spark plug (one spark per crankshaft revolution), ignition system is okay. If spark is not present, go to IGNITION SYSTEMS in I - SYS/COMP TESTS article in the ENGINE PERFORMANCE Section.
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