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Do the spark plugs wires need to be replace when replacing spark plugs?
Wiki User
∙ 13y ago
No, they don't necessarily have to be replaced. However it is usually a good idea to replace the wires along with the spark plugs.
As the wires age and go through heating cooling cycles they get stiff and brittle. As you flex the wires to remove them from the spark plugs the inner conductor often breaks causing a misfire. Also when you pull the spark plug boots off of the spark plugs the connector often can break loose and stay on the spark plug, thus ruining the wire.
Wiki User
∙ 13y ago
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