![]() ![]() This will help you avoid further engine problems. When you see white soot on spark plugs, the most important thing to do is find out why it is happening. These spark plugs will have brown deposits on the side electrodes. A properly working engine will have gray or light tan tip spark plugs. White soot can also be caused by engine overheating, air leakage, and fuel injection problems. These injectors will dose fuel incorrectly, causing a poor mixture. White soot can also indicate a faulty injector. If you notice white soot on your spark plugs, you may have an improper fuel mixture or ignition timing. The color of the spark plug also reveals a variety of other problems. ![]() Running an engine that is too hot can burn holes in the pistons, resulting in possible engine damage. White colored spark plugs are usually caused by engine overheating. Whether you are running a car, motorcycle or truck, reading spark plug color is a good way to see if your engine is functioning properly. Spark Plug Color Meaning-What does a white colored spark plug mean? Therefore, you want to keep an eye on your spark plugs, and have them checked by a professional if you notice any signs of failure. In addition, spark plugs are among the cheapest parts for a vehicle. ![]() However, it is not a bad idea to check your spark plugs periodically to make sure they are in good condition.Ĭhoosing the best spark plug for your vehicle is important, because it is responsible for the overall performance of your engine. This could be due to poor ignition voltage, a broken choke, or a faulty seat.Ī brown spark plug is a good indicator that your engine is in good shape. It is also a sign that your ignition system is functioning improperly. There are a number of things that the spark plugs can tell you about the overall performance of your engine.Ī yellow spark plug may be a sign of low quality fuel. Taking a look at a spark plug is a great way to get a quick diagnostic read on your engine. Spark Plug Color Meaning-What color is a bad spark plug? If the plug is running lean, it will show up as light gray deposits, while a rich plug will show up as dark deposits. The most common are light gray and dark gray, but there are also tan and black. There are several different types of deposits that can show up on spark plugs. It is also possible to cut the plug open and look at the porcelain deep inside the housing. It will usually start out white and then change color with heat. Other ways to read spark plug color include looking at the insulator. They should also have a light tan or gray color. These are usually brown in color and may have some slight wear. The other obvious way to read spark plug color is by examining the electrodes. This is a bulbous end with a metal hook to one side. The most obvious and easiest way to read spark plug color is by looking at the firing tip. For instance, if a spark plug shows signs of overheating, it could be a sign of problems with the cooling system or the intake manifold. It is also a quick way to spot engine problems. What Does Black Soot on a Spark Plug Mean?Ĭhoosing the right spark plug color can be a useful tuning aid.What are the symptoms of a rich fuel mixture?.Spark Plug Color Meaning-What does it mean when a spark plug is orange?.Spark Plug Color Meaning-What does a white colored spark plug mean?.Spark Plug Color Meaning-What color is a bad spark plug?.
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