What is the function of a distributor cap?

The distributor cap is a critical component in an internal combustion engine's ignition system. Its primary function is to distribute the high-voltage electrical current from the ignition coil to the correct cylinder's spark plug at the right timing. This ensures that the air-fuel mixture in each cylinder ignites properly, allowing the engine to run smoothly and efficiently. Additionally, the cap protects the internal components from dirt and moisture, which can disrupt performance.