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Worn or damaged valve guides, worn or damaged piston rings, rich fuel mixture and a leaky head gasket can all be causes of spark plugs fouling. An improperly performing ignition system might also be a cause for spark plug fouling.


A spark plug is a device that produces an electrical spark, which ignites the mixture of fuel and air in the engine's combustion chambers. A spark plug initiates the combustion in the internal combustion engine.


To clean spark plugs, disconnect the cables, remove the spark plugs, scrub them with sandpaper and a wire brush, wipe them with solvent, reinsert them, and reattach the cables. This 45-minute process requires work gloves, a bench vise, sandpaper, a brush, a ratchet wren...


There are several steps to changing spark plugs, beginning with making sure the engine is completely cool. Next, remove one spark plug wire by gently lifting straight up from the spark plug. It is important to change one plug at a time to avoid mixing up the spark plug ...


To install a spark plug, remove the wire from the existing spark plug, and remove the plug with a spark plug socket. You need a spark plug socket with an extension, electrical or masking tape, and torque wrenches.


The numbers on spark plugs indicate properties such as spanner width and design, heat rating, thread length, construction features and electrode distances. Different manufacturers use similar coding, which makes it easier to interchange brands if need be. Measurements a...


The function of a spark plug is to produce the sparks necessary to ignite the gas and air in the engine, initiating a combustion reaction that provides energy to run the automobile. Spark plugs are designed to fit perfectly into each cylinder of the motor.