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Message: <blockquote data-quote="kyheng" data-source="post: 1306099" data-attributes="member: 13624">Yes, you are wrong abit, only injection cars(newer models) will control fuel to the combustion chamber. Normally how good a injection system is, there is still some unburnt fuel that will go to exhaust. If not mistaken is around 5-10% or more. For carburetor, more will escape through. So if your plug cablle is standard, the spark created will be small and the worst is when your plug is almost time(all lot of carbon around the plug). You can feel like the car is lack of power. That is why if the plug cable is still standard, even change to a better plug also no point, as the supplier(plug cable) cannot supply enough power to the plug.But if use a thicker one, 8mm or above, the spark created will be bigger and the combustion is more complete. Some poor aftermarket cable does create airplane sound on our speakers, but this is not always a absolute answer for it. Is sometimes we use a too big thickness, where the supply is too big but the return(earth) cannot cope with it. Most of us never use the grounding kit, this is 1 of the cause(I using 9.5mm cable but never add grounding kit and don't have airplane sound also)</blockquote>

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