my friend noticed i get 10mpg in the city and suggested i change my spark plugs, since i changed oil/filter and air filters. having bad spark plugs can cause misfires, but i dont know if my car is misfiring at all. should i change the sparks? or how can
As said to your other question, you do not have a misfire.
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When you think of replacing spark plugs, it’s probably in the context of a routine engine tune-up. But when automotive engineers consider the subject, they’re thinking in terms of replacing the spark plug altogether, finding alternative ways of performing the spark plug’s function and doing it better.
Over the 100-plus year history of the gasoline-powered internal combustion engine (ICE), few elements have remained as constant in concept and function as the spark plug. But now, its days may be numbered.
Not that the spark plug itself hasn’t evolved. Today’s tiny plugs with their iridium electrodes and 160,000-km replacement intervals resemble their early predecessors only in principle.
The spark plug’s role, as it’s name implies, is to generate a spark to ignite the air-fuel mixture in the combustion chamber of an engine cylinder. And to do so consistently, at precisely the right time, up to 75 times a second in some modern engines (more than twice that rate in today’s Formula 1 engines).
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New (left) and the old (right): the Advanced Corona Ignition System produces a more complete charge that can save up to 10 per cent of fuel, the firm says. When you think of replacing spark plugs, it's probably in the context of a routine engine |
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The problem was with the magneto, which generates the voltage needed to fire a spark plug. Two replacement coils from Germany and a rebuilt coil from Chicago failed to cure the problem. After troubleshooting every other component in the ignition system |
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A dirty spark plug causes misfiring, which wastes fuel. Spark plugs need to be replaced regularly. Dirty air filters – An air filter that is clogged with dirt, dust and bugs chokes off the air and creates a rich mixture – too much gas being burned for |
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The commission's Consumer Energy Center states that excessive idling can damage engine components, including cylinders, spark plugs and exhaust systems. Fuel is only partially combusted when idling because an engine does not operate at its peak |
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The Detroit automaker will initially limit the plug-in Spark to select markets worldwide and in the US, including California. A gas-powered Spark with a 1.2-liter engine and 128 horsepower arrives at US dealers next year. GM already sells this gas |