Verifying the resistance of individual plug wire Checking individual plug wire resistance with a digital ohmmeter, one can check the insulation of the spark plug cables by visually inspecting them (to verify no burns, cuts, or breaks of the insulation) during each tune-up or inspection, as well as inspecting the boots and nipples of the
Distributor Cap or coil. Once a high tension wire has been disconnected out of a spark plug, coil or distributor terminal housing, silicone grease is applied to the boot and it should then be reconnected. The wires resistance should be verified using an ohmmeter every 50,000 miles or 60 months because when there is too much resistance, the engine would adopt a no-start attitude during wet weather, and the resistance value of the individual models will be different. Replacement of the wires in sets and not in single sets is also recommended where one spark plug wire is tested at a time and any faulty wire is marked to prevent confusion with the other wires. Caution should also be exercised when replacing spark plug wires and one should not pull the wire but instead pinch the insulator and twist it towards the wire. When installing it, the silicone grease should be applied to the boot prior to reconnection with all the wires hooked on the correct terminal of the coil pack or distributor cap and the terminal connector fully fitted into position. Old wire set wire separators should be used in the new set in more or less the same position and all wires need to be interconnected to the correct spark plugs making sure that they have all seated on the terminations.