Testing for Spark

WARNING: High voltage in the ignition system can cause a strong electrical shock. Avoid direct contact to the vehicle body during the following spark test.

SPARK TEST
1. Remove the spark plug.
2. Connect the spark plug to a high-tension lead.

View: Checking Spark:

3. Hold the high-tension lead with insulated pliers 5 - 10 mm (0.2 - 0.39 in) from a ground.
4. Crank the engine and verify that there is a strong blue spark. If not, replace the spark plug or high-tension lead as necessary.

INSPECTION
Check the following points. If a problem is found, replace the spark plug.

View: Spark Plug:

- Damaged insulation
- Worn electrodes
- Carbon deposits
If cleaning is necessary, use a plug cleaner or a wire brush. Clean the upper insulator also.