Secondary Ignition Circuit: Notes
NOTE:
When checking secondary voltage, do not remove the following spark plug wires while the engine is running:
- No. 1 or 8 on V8 engines (Dura-Spark I & II).
- No. 3 or 4 on V8 engines (Solid State).
- No. 3 or 5 on 6-cylinder engines.
- No. 1 or 4 on V6 engines.
- No. 1 or 3 on 4-cylinder engines.
- Perform the following test if no or very little voltage is available to the spark plugs. Connect an oscilloscope to engine. Use grounding leads and insulated pliers when called for.
- On vehicles equipped with catalytic converter, DO NOT run engine for more than 30 seconds with spark plug wire removed.