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The procedure and nuances of connecting high-voltage spark plug wires. Subscribe to the channel Wires must be resistant to the aggressive environment under the car's hood, withstand temperatures from -60°C to +240°C, maintain their conductive properties, and prevent current leakage up to contact with the spark plug tips. Poor-quality or faulty wires can damage certain vehicle components, such as the electronic system, and impair engine operation, causing it to misfire. Current leakage or increased resistance leads to a decrease in pulse strength and, as a consequence, either delayed ignition timing, misfires, stalling at high RPMs, or no spark at all, especially if the spark plugs are slightly dirty. This results in reduced performance, increased fuel consumption (by 4-7%), and higher emissions. Therefore, wires must be kept in good condition.