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Test NF-2A - Checking Secondary Ignition & Timing

  1. Turn engine off. Connect a suitable engine analyzer to engine. Start engine, and let it idle. Set scope to read display or parade pattern. Follow equipment manufacturer procedure for pattern analysis.
  2. If secondary ignition pattern is not okay, repair indicated component in secondary ignition system. Perform VERIFICATION PROCEDURE VER-2. If secondary ignition pattern is okay, remove all lower spark plug wires individually from coil pack. Observe secondary kilovolt line.
  3. If open circuit secondary voltage is not at least 25 kilovolts, replace ignition coil module. Perform VERIFICATION PROCEDURE VER-2. If open circuit secondary voltage is at least 25 kilovolts, reconnect spark plug wires.
  4. Ensure engine temperature is more than 180°F (82°C) before proceeding. Using DRB-II, read spark advance. Increase engine speed to 2000 RPM. If spark advance does not change with increase in RPM, replace Single Board Engine Controller (SBEC). Perform VERIFICATION PROCEDURE VER-2. If spark advance changes with increase in RPM, test is complete.
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