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F150 5.4 liter v8 running rough, white smoke being exhausted on startup

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White smoke while running usually indicates water in the combustion chamber (bad head gasket or cracked head) but white smoke on startup only is usually a sign of unburnt fuel (rich mixture). Either bad injectors, injector seals? Maybe something else That's assuming it's fuel injected

Posted on Aug 12, 2008

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