Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la
If it fails: lemon-manuals.org.ua

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Spark Plug: Testing and Inspection

CLEANING and INSPECTION
Clean spark plugs as necessary with a professional spark plug cleaner (follow manufacturer's instructions). Inspect the firing tip. Refer to Spark Plug Inspection Chart. Replace with the proper replacement spark plug as listed on the Vehicle Emission Control Information (VECI) decal, if the spark plug is worn or damaged.