Check and replace
At each adjustment, visually inspect the cables for carbon deposits, breaks, or damage to the insulation. Check the caps and nipples on the distributor cap and coil. Replace any damaged wires. Always replace spark plug wires in complete bundles (sets) along with the coil wires. Length is also important; use the correct kit for your vehicle.
Approximately every 50,000 km, the resistance of the wires should be checked with an ohmmeter. Wires with excessive resistance can cause no ignition, and the engine will be difficult to start in bad weather. Typically, the service life of the cables is approximately 50,000-80,000 km.
To check the resistance, remove the wire from the spark plug and distributor cap. Examine each contact in the wire for any sign of breakage or burning. A slight color change is normal, but there should be no obvious signs of burning. Connect one test lead to each end of the cable. Replace any wire that has a resistance greater than 25 kOhm. Test the high-tension wires from the coil in the same way. If the resistance is greater than 25 kOhm, replace the cable. Remember that resistance also depends on the length; the longer the cable, the higher the resistance. So if the cables on your car are longer than the factory ones, the resistance will be higher, quite possibly higher than the limits listed here. Honda recommends sticking to the 25k ohm limit in any case.
When installing new cables, replace them one at a time to avoid confusion. Replace the longest cable first. Install the cap tightly onto the spark plugs. Route the wires in the same path as they were originally routed. Press the nipples firmly into the tabs on the cap or coil. Secure each cable in all holders or clamps along the wiring path.
(Refer to the original source on the website: «HondaBook»)