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Why do spark plugs turn black?

Updated: 12/9/2022
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Q: Why do spark plugs turn black?
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No. Spark plugs have nothing to do with your turn signals. Try changing the turn signal bulbs. Spark plugs are only used for the combustion of the engine.


Why are the spark plugs black on my 1993 Toyota tercel?

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Your 1968 mustang engine will turn by hand without the spark plugs but with the spark plugs in it will not turn by hand?

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To change spark plugs on a 1994 Toyota Camry, remove the black shafts. The spark plugs are down the four holes. Use a socket set with extension to reach the spark plugs. Replace old spark plugs with new ones.


My Honda crv cranks but wont turn over. the spark plugs are not getting spark?

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Why do sparkplugs turn black on a lawnmower and how do you fix it?

Black spark plugs indicate that the fuel mixture is too rich in fuel. White spark plugs indicate that the fuel mixture does not have enough fuel. The proper color for spark plugs is tan. Black spark plugs also indicate that oil is entering the combustion chamber and burning. If your lawnmower is 2 stroke, this is probably normal due to the gas/oil mix of fuel added to the tank. If your lawnmower is 4 stroke, you need to adjust the carbs to reduce the amount of fuel in the fuel/air mix.


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Why does car turn off when gas is released?

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