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Emissions and Exhaust Systems
Nissan 240SX

What could be the problem when some heavy light colored smoke is seen after driving a car on a highway stopping and starting it again?

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Wiki User
2005-02-06 15:33:15
2005-02-06 15:33:15

Usualy this is caused by condesation forming in the exhaust system.When the car is driven for a long period and or at highway speeds the exhaust system heats up. Then when it is shut down moisture from the ambient air condenses/collects inside the exhaust,then when you drive the car again the moisture exits the exhaust as steam or even as water dripping from the end of the tailpipe.This is mutch easier to see on a cold day. B

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