Look at the
Spark Plug wires when you put new plugs in, and check the air quality in a garage with a fan on before shifting to the car ignition system. When you notice flashing or sparks coming out of damaged areas on your spark plug wires as your engine runs, prepare to replace the wires, wait for the engine to cool off, check the distributor cap, and rotor. Mark each spark plug wire with a number in your correct order by sticking numbers on with strips of tape. Take the plug wire off the spark plug by using a removal tool or turning the rubber boot, never pull on the wire directly. In the boot, look for a white colored powder of corrosion, and make sure the wire slides into the spark plug accurately; if it's loose, compress the metal connector enclosed in the boot. Use a rag to wipe away dirt and grease from the wire, pay attention to it looking burned, cracked, or broken while keeping it from bending hard. Pull out the distributor wire from its connection, taking care to check the condition, then see if the fit is right before installing a new one. When checking the wires, make sure each one has a firm connection at both ends: the distributor and around the spark plug. Pick out spark plug wires precisely designed for your engine type, one by one, to be sure you replace the right wire. Loosen the bolts securing the distributor cap, remove them, check the cap for cracks and contacts that have worn down, and put on a new one if needed. If you see cracks or carbon tracks on the rotor, take it off the distributor shaft, replace it immediately. Keep the old cap only when you check and replace its spark plug wires if the detection resistance value is higher than it should be. Move one wire at a time from your old cap when putting on a new one, keeping the wires in their original order.