Here is how you can diagnose an engine that is running rough and is having a misfire, burning oil, running too lean or too rich, has advanced timing or a bad oxygen sensor and other diagnosis by simply looking at the spark plug. Here are links to products which were used in this video: Camera : https://amzn.to/3iKMb5N Microphone: https://amzn.to/2FSeQqO Facebook: https://www.facebook.com/Ratchets2015 Twitter: https://twitter.com/Ratchets15 Instagram: https://www.instagram.com/ratchetsandwrenches Disclaimer: Due to factors beyond the control of Ratchets and Wrenches, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. Ratchets and Wrenches assumes no liability for any property or personal damage that may arise from doing a repair on your vehicle after watching any of my repair video's. Due to factors beyond the control of Ratchets and Wrenches, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Again Any injury, damage or loss that may result from improper use of tools, equipment, or the information contained in this video is the sole responsibility of the user and not Ratchets and Wrenches.