Learn how to read your engine’s health simply by checking the color of your spark plugs. In this video, I break down what each spark plug color means—healthy tan, oily black, sooty black, and especially white spark plugs, which often signal dangerous lean conditions. You’ll learn: How spark plug color reveals engine performance What white spark plugs really mean Common causes of lean spark plugs How to diagnose fuel, air, vacuum, and timing problems What you should check first before replacing p
5:44
Learn how to read your engine’s health simply by checking the color of your spark plugs. In this video, I break down what each spark plug color means—healthy tan, oily black, sooty black, and especially white spark plugs, which often signal dangerous lean conditions. You’ll learn: How spark plug color reveals engine performance What white spark plugs really mean Common causes of lean spark plugs How to diagnose fuel, air, vacuum, and timing problems What you should check first before replacing p
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