Spark Test

Spark Test:

1. Disconnect #1 ignition wire 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.

NOTE: Engine may start and run rough.

4. Repeat this process at each spark plug.

^ If any cylinder does not show spark, check for defective secondary ignition components.
- If all cylinders test O.K., inspect for fouled spark plugs and clean or replace as necessary.
- If all spark plugs are O.K., refer to COMPUTERIZED ENGINE CONTROLS.

5. If no faults are found in the above tests, review CHECKING THE BASICS.