Why Grey Smoke out of Chrysler Voyager?

Daisy

New member
I have a 2002 voyager 2.5 diesel manuel ( yes diesel ). on initial start up first thing there is a fair bit of gey smoke comes out exhaust.
after a few minutes it clears, periodically this happens on hills or during the day but is not all the time.
engine initally sounds very rough until smoke clears.
any ideas ?
 
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