Question about 2002 Jeep Grand Cherokee

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Had to start then blue smoke on cold engine start

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Blue smoke usually means that oil of some sort has entered the combustion chamber. While that COULD be the CAUSE of a hard start (assuming you mean 'hard' not 'had' start) it may be just a symptom or result of the actual cause. Things that might be important to diagnose would be mileage, engine, any history of overheating, old fuel, moisture content in fuel, etc.

Posted on Apr 23, 2013

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Posted on Jan 02, 2017

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Could the problem of white smoke when start up in morning be that the cold start sensor could be at fault


White smoke is actually normal Susan. It isn't smoke, it is steam.

White is steam
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My kia sportage diesel is puffing blue smoke.


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Runing rough for 1 min. after start cold engine


What car , and year and engine? What color smoke?

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