Toyota 90919-12949 Cord, Spark Plug RESISTIVE

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The spark plug wires should be checked whenever new spark plugs are installed. Begin this procedure by making a visual check of the spark plug wires while the engine is running. In a darkened garage, start the engine and observe each plug wire. If there is a break in the wire, you will see arcing or a small spark at the damaged area. If arcing is noticed, make a note to obtain new wires, then allow the engine to cool and check the distributor cap and rotor. The spark plug wires should be inspected one at a time to prevent mixing up the order. Each original plug wire should be numbered to help identify its location. Disconnect the plug wire from the spark plug by using a removal tool or twisting the boot and pulling it free. Check inside the boot for corrosion. Push the wire and boot back onto the end of the spark plug, ensuring a tight fit. Wipe the entire length of the wire to remove dirt and grease, checking for burns, cracks, and other damage. Remove the rubber boot and disconnect the wire from the distributor, checking for corrosion and a tight fit. Inspect the remaining spark plug wires, ensuring they are securely fastened at the distributor and spark plug. If new spark plug wires are required, purchase a set for your specific engine model and replace them one at a time to avoid mix-ups in the firing order. Detach the distributor cap and look for cracks, carbon tracks, and worn or loose contacts. Pull off the rotor and examine it for cracks and carbon tracks. Replace the cap and rotor if any damage or defects are noted. It is common practice to install a new cap and rotor whenever new spark plug wires are installed, but if you wish to continue using the old cap, check the resistance between the spark plug wires and the cap first. When installing a new cap, remove the wires from the old cap one at a time and attach them to the new cap in the exact same location.