Replace Honda Spark plug resistor & Honda Double platinum plug replacement. Browse Honda Spark plug suppressor cap. Purchase Honda Spark plugs iridium. Maintaining the spark plugs in your Honda is critical for peak engine performance and fuel efficiency. Signs that your spark plugs need replacement include a misfiring engine, poor acceleration, increased fuel consumption, or a rough idle. To extend their lifespan, ensure your engine is tuned correctly, use high-quality fuel, and follow your Honda's recommended service intervals. When choosing new spark plugs, consider iridium or platinum types for their durability and superior performance. Always opt for OEM or top-tier aftermarket brands to match your Honda's specifications. Proper installation is key, so apply anti-seize to the threads and torque them to the manufacturer's recommendation to prevent over-tightening and ensure optimal conductivity.