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Test NF-2A - Checking Secondary Ignition & Timing

  1. Turn engine off. Connect 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. If secondary ignition pattern is not okay, repair indicated component in secondary ignition system. Perform VERIFICATION TEST VER-2  . If secondary ignition pattern is okay, go to next step.
  2. Disconnect any spark plug wire. Observe secondary kilovolt line. If open circuit secondary voltage is not at least 25 kilovolts, repair indicated component in secondary ignition system. Perform VERIFICATION TEST VER-2  . Go to next step if open circuit secondary voltage is at least 25 kilovolts.
  3. Reconnect spark plug wire. Ensure engine temperature is more than 180°F (82°C) before proceeding. Disconnect coolant sensor connector. Coolant sensor fault will be set and CHECK ENGINE light will be on. Using a timing light, check ignition timing. If timing is not within 2 degrees of specification, adjust timing. If timing is within 2 degrees of specification, go to next step.
  4. Using timing light offset dial, zero timing mark in timing mark window. Remove camshaft timing inspection plug from timing belt cover. Using timing light, check camshaft timing. Camshaft timing index hole should be in center of inspection hole. If camshaft timing index is not in center of inspection hole, adjust or replace timing belt. See appropriate article in the ENGINES Section. If camshaft timing index is in center of inspection hole, go to next step.
  5. Reconnect coolant sensor. 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 TEST VER-2  . If spark advance changes with increase in RPM, test is complete. Using DRB-II, erase coolant sensor fault.
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