Blue smoke coming out the tailpipe may mean a failing gasket, O-ring, or seal.
2
If black smoke is coming out the tailpipe, it could indicate a problem with the fuel injection system, the fuel pump, the engine computer, or the carburator.
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Periodically check the car's front grill vents and tailpipe to eliminate clogs.
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The rear of the fuselage pod was slightly re-shaped to accommodate the larger engine tailpipe.
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These are the only two substances for which older cars have a legal limit on tailpipe emissions.
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Watch for smoke coming from your tailpipe or hood, and keep an eye out for puddles under your car.
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White smoke from the tailpipe can indicate water or antifreeze in the engine cylinder, meaning you have a failed head gasket.