Replace Jeep Resistor copper plug replacement. Discover Jeep Spark plug resistor. Get Jeep Iridium platinum spark plugs & Jeep Resistor Spark Plug. Maintaining the spark plugs in your Jeep is crucial for optimal performance and fuel efficiency. Regular inspection and cleaning can extend their lifespan, but signs such as rough idling, misfires, or difficulty starting signal it's time for a replacement. When selecting new spark plugs, Jeep owners should consider options like copper for better conductivity or iridium and platinum for longevity. Always ensure you match the spark plug to your Jeep's specifications for seamless installation and peak operation. High-quality spark plugs are a small investment that ensures your Jeep runs smoothly, translating to less downtime and more adventure on the road.