If your engine's spark plugs have gone wrong, you need to replace them immediately to prevent any damage to your engine. Replacing spark plugs is easy. If you know a little of handy work, you can easily do the job at home alone. All you need to do is follow the steps carefully. Below is our step-by-step guide that can help you: First, ensure the engine is cold. Disconnect the electrical connectors from the ignition coils. Remove the ignition coils. Examine the spark plugs. If there is any dirt & debris inside the plugs, remove it using compressed air. Unscrew the plugs using a ratchet. With the help of a gap gauge, check the electrode gap. Assure the gap in the plugs is as per your engine. Simply place and screw the new spark plugs by hand and then tighten it further with the help of a torque wrench. Reinstall the ignition coil carefully, along with their electrical connectors.