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What causes a 1987 Chevy caprice to blow black smoke when I crank it up and while its running?
Wiki User
∙ 14y ago
Black smoke is always too much gas. Its running too rich. Poor mpg! A good mechanic can scan it in a minute. Might be an O2 sensor failure causing 'open loop' all the time.
Wiki User
∙ 14y ago
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