A Distributor Cap works in conjunction with the rotor arm, and transfers electrical charge from the Ignition Coil to the Spark Plugs. As the Distributor Cap works alongside Electrical Currents, over time, they begin to corrode, resulting in misfires. The distributor cap is the cover that protects the distributor's internal parts and holds the contacts between the internal rotor and the spark plug wires. As distributor caps are exposed to a constant electrical charge, their metal terminals will ultimately corrode. You may then notice the following symptoms: Car starting to misfire intermittently, Car not starting at all, Unusual noises coming from the engine? These problems are signs that you need to replace your car’s distributor cap. Intermotor has been a leading brand in the automotive aftermarket for over 40 years, providing high-quality ignition and engine management components. Their distributor caps are designed to meet or exceed OE specifications, ensuring a perfect fit and reliable performance.