Spread the love


Spark plug wires, additionally acknowledged as ignition cables, are a key phase of the ignition system. Car engines that have a distributor or faraway coil pack have spark plug wires that switch the spark from the coil to the spark plug.


Step-by-Step Instructions

Changing spark plug wires on a normal groundwork is vital to retaining a vehicle’s engine at its best.

Removing the Old Spark Plug Wire Set

Remove and exchange one wire at a time, beginning with the longest wire. By doing them one at a time, you will no longer have to fear about by chance switching the wires. When doing away with wires from the spark plug or distributor cap, twist or rotate the boot to loosen it from the plug. Do now not jerk or tug on the wires or you may also spoil the connection. Be certain to solely pull on the boot; do now not pull on the cable itself.

Installing the New Spark Plug Wire Set


  1. Match the longest wire in the new set with the longest wire on the vehicle, then suit the subsequent longest, and so forth. Do no longer healthy for same size as this varies with extraordinary wire manufacturers. What is even extra integral than matching cable size is that you do no longer combine up the order of the spark plug wires. Improper set up of these wires can end result in negative combustion or misfiring of the cylinder, which will purpose drivability problems and doubtlessly extreme harm to the engine.


  1. To deploy a new wire, push the new spark plug wire boot on one give up to the module, and then push the subsequent stop onto the spark plug. Roll the part of the boot gently to let out extra air in any other case the boot can also now not seat properly, inflicting the wire to dislodge from the cap.


  1. When putting in the spark plug stop of the wire, push the wire on the spark plug whilst keeping the give up of the boot. Continue gently pushing and twisting. The stop have to snap on firmly with the boot over the spark plug insulator. Do now not pressure the wire. When successfully aligned, the wire will go on without problems and you will hear a “click.” Test by means of pulling again tightly if the wire comes off easily, it is improperly installed.


Routing the New Spark Plug Wires


When routing spark plug wires to cylinders it’s essential to do so in sequence of the firing order to keep away from cross firing. Spacing spark plug wires too shut or parallel to every different can additionally end result in cross firing due to the inductive subject which builds up in one wire as the modern flows in the other. It’s nice to preserve spark plug wires in function via the use of insulated metal, or higher but plastic or fiber brackets to keep away from this.

Route the new spark plug wires away from the exhaust manifolds or different steel objects. This protects them from the warmness of the manifolds and reduces capacitive voltage loss between the conductor and steel surfaces. Good spark plug terminals are made with a snap ring that provide a steel “click” or “snap” when they are desirable set into place. Make certain the terminals are sealed right and then firmly pressure any air out of boots and nipples.




  • Make positive your car’s engine is bloodless earlier than you start. Under hood surroundings can be very heat – solely put off the spark plugs wires when the engine is cool to the touch. It may take a few hours for the engine to cool down.


  • Wipe off the spark plug insulator and distributor cap towers earlier than putting in new wires. Route the plug wires precisely as they have been originally. To keep away from arc-over, do now not route wires of consecutively firing cylinders subsequent to every other.


  • A couple of matters to preserve in thought if you have greater radio noise upon completion – (1) Metallic wire units can radiate the ignition noise like an antenna. (2) Always test radio noise with the hood closed and latched. (3) Make sure the spark plug wires are not parallel to the sensor wire.
  • Never clamp spark plug wires tightly or permit them to be pinched between the air cleaner and the distributor. The excessive voltage stresses will be multiplied at these factors and hasten wire failure.


  • Bundling of spark plug wires and wrapping them with tape, pulling them thru metallic tubes or dressing them tightly towards the engine, may also make them seem neat however can motive serious voltage losses and/or cross firing. Changing the routing from the unique OEM routing can lead to early spark plug wire failure.

Be the first to comment

Leave a Reply

Your email address will not be published.