Ignition System: Testing and Inspection

Spark Tester:

1. Disconnect #1 ignition coil at the spark plug.
2. Install a spark tester into the end of the spark plug boot.
3. Have an assistant crank the engine over and check for spark at the tester.
4. Repeat this process at each spark plug.
^ If any cylinder does not show spark, proceed to component test.
^ If all cylinders test O.K., inspect for fouled spark plugs and clean or replace as necessary.
5. If no faults are found in the above tests, proceed to COMPUTERS AND CONTROL SYSTEMS for further diagnosis.