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2020 6.6 gas rough idle at start


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I cant imagine a rough idle being normal for a new engine, even if it is a little cold out

 

5,500mi gas 3500hd cc

 

noticed it last week, start truck at slightly below freezing and it had trouble keeping a steady idle, felt like it was about to stall.  Problem went away after driving 15 miles.

Engine also took several seconds to start from cold, highly unusual.

 

It did it again when temps were 40 out, Long time for engine to start and felt like rough idle.  
 

no codes thrown as of yet

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6 hours ago, SkidooSteve12 said:

Do you buy gas from the same gas station or different ones?

Different ones and the last fill up was at a different station from near empty to full

 

There are two gas stations I normally use and this last one was one I have not used before

Edited by greatmizzou
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  • 1 year later...

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