𝐒𝐩𝐚𝐫𝐤 𝐩𝐥𝐮𝐠

A spark plug is used in the combustion chamber to ignite the gas/fuel. It is timed to work with the cylinder and goes as slow or as fast as the engine RPMs. The spark must be effective in order for combustion to occur correctly. A misfire, rough idling,  or knocking can occur when spark plugs are not working correctly.
To check your spark plugs you'll need to be aware of how your engine is running. Replacement might be needed if symptoms mentioned are occurring. You can also pull out the plug(s) and look at their condition. If it is very dirty, it needs to be replaced. The life span of a spark can be from 10,000 miles to 100,000 miles depending on the type and engine factors.