Spark Plug Inspection

Connect the spark plug to the high-tension cable. Holding the spark plug with insulated-handle pliers, connect the spark plug body to vehicle ground.

Do not touch the vehicle body during the following operations.

Have an assistant crank the engine with the starter. A stable, strong spark should be visible between the spark plug electrodes.

If there is no spark or the spark is weak, check and correct the following defects:

– if carbon deposits are present, clean or replace the spark plug;
– if the spark plug is contaminated with oil, clean or replace the spark plug;
– if the electrodes are worn or burned, replace the spark plug;
– if the ceramic insulator is damaged, replace the spark plug;
– if the spark plug seal ring is damaged, replace the spark plug;
– if the spark plug electrode gap is incorrect, adjust the gap.