Test NF-2A - Checking Secondary Ignition & Timing
- 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's 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, disconnect any spark plug wire. Observe secondary kilovolt (kv) line.
- If open circuit secondary voltage is less than 25 kilovolts, replace ignition coil. Perform VERIFICATION TEST VER-2 . If open circuit secondary voltage is at least 25 kilovolts, reinstall spark plug wire. Ensure engine temperature is more than 180°F (82°C) before proceeding to next step.
- Using DRB-II, read total spark advance. Increase engine speed to 2000 RPM. If spark advance does not change with increase in RPM, replace engine controller. Perform VERIFICATION TEST VER-2 . If spark advance changes with increase in RPM, test is complete.