Spark Check

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Check EEC-IV system for fault codes and repair if necessary. See Quick Test procedure in the TESTS W/CODES article. If no fault codes are retrieved and vehicle is a no-start, use Neon Bulb Spark Tester (D89P-6666-A), check for spark at each spark plug wire while cranking. If spark is consistent and equal at each spark plug (one spark per crankshaft revolution), go to appropriate ignition system in the SYSTEM/COMPONENT TESTS article in this section.