Every 60 thousand km it is necessary to check the resistance of the wires using an ohmmeter. Wires with increased resistance can cause interruptions in operation and difficulties with starting the engine in wet weather. On average, the service life of wires is 58-80 thousand km.
To check the resistance, remove the distributor cap, leaving the wires leading to it. Connect the ohmmeter lead to the electrodes.
Any wire with a resistance greater than 22 kOhm should be replaced.
It is necessary to check the high-voltage wire from the ignition coil by connecting the ohmmeter wire to the central contact of the distributor cap and the end that goes to the ignition coil. If the resistance is greater than 2500 ohms, replace this wire and check the resistance of the wire itself. Resistance above 1500 Ohms is sufficient reason for replacement. It should be remembered that the resistance depends on the length of the wire; the longer the wire, the greater its resistance. So, if your car's wires are longer than the original ones, their resistance will be higher, but it should not exceed the limits specified above.
When installing new wires, replace them in a way that avoids confusion. You need to start by replacing the longest wire. Place the cap tightly on the spark plug. Run the wires in the same way as before. Place the caps firmly on the distributor cap and on the ignition coil.