Spark Plug Test

SPARK PLUG TEST




1. Remove the spark plug and connect to the ignition coil.




2. Ground the spark plug outer electrode (body), and crank the engine.
Check that there is an electrical discharge between the electrodes at this time.

SPARK PLUG CHECK AND CLEANING






CAUTION:
- Never attempt to adjust the gap of the iridium plug.
- Do not attempt to clean the spark plug because it may result in damage to the electrode. However, if carbon deposits must be removed, using a sand blast type plug cleaner, complete the cleaning within 20 seconds to protect the electrode. Do not use a wire brush.

NOTE: Obey the maintenance interval of the vehicle for the spark plug replacement. If the plug gap and insulation resistance are normal, check the plug state and clean it if necessary.

SPARK PLUG GAP CHECK

Check the plug gap with the wire type plug gauge. Replace it if the limit is exceeded.

Standard value: 0.7 - 0.8 mm (0.028 - 0.031 inch)
Limit: 1.2 mm (0.047 inch)