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AnswerThere are several possible answers to what makes a car smoke. If the smoke is blue-black the engine is burning oil. This could be caused by worn rings or valve guides. If the smoke is gray black it is caused by a to rich gas mixture. This could be caused by a malfunctioning choke or injector, oxygen sensor, or other fuel related equipment. If the smoke is gray white it could be a blown head gasket or cracked block, allowing coolant to get into the exhaust system. Other causes of smoking could be an oil leak that is dripping on to the exhaust pipe or muffler.
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11y ago

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