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you don`t say what color the smoke is so this is a basic indicator with different colored smoke.if it is white smoke like you would see from any car started up on a cold day then this is normal for cars as the exhaust is hotter than the ambient air temperature.if it is a thick heavy looking white smoke and has a sweet odour then this can indicate a coolant leak into the combustion chamber after sitting overnight such as a bad head gasket,if it is a blue smoke then this indicates oil leaking into the cylinders past the valve seal or valve guides on a cylinder that is on the intake stroke when the motor was shut off,if it was rings it would show only under acceleration,if it is black smoke this indicates an overly rich fuel mixture.
Sometimes diesel engines will put out black smoke under extreme acceleration. Other than that, they shouldn't smoke. Black is excess fuel, White smoke is water and bluish is oil. White smoke on a cool morning is not necessarily a sign of a problem unless it happens every time you start it through a warm day. Hope this helps.
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