Everytime I start my 2011 f250 6.2, with ambient temperature at -30 or colder. I get an extremely rough idle for roughly 10 to 30 seconds in length. Sounds like it is running on only 4 cylinders, then you I will hear a popping noise and it idles normally after that. My guess is an exhaust restriction of some sort, maybe egr valve related. It never throws a code during or after the rough idle. Also doesn't matter if its plugged in or not. Any ideas? Also truck has roughly 100k miles on it.

 

I'd change the oil to full synthetic 0 /20
@-30F.

 

Mine did this for the first time yesterday. It only idled rough for about 5 seconds but this is the first time. I run royal purple 5/20. I usually plug my truck in but didn't have it plugged in yesterday. It was -24C.

 

I run full synthetic 5w20 with an oil pan heater, so I don't think oil flow is my issue.

 

Could it be the gas blend ?

 

5% ethanol blend from above ground tanks and a high volume cardlock.

 

Interesting, mine does not do anything like that even at -35.

 

Omg, will it start at -30 when not plugged in. If Its that cold, I don't even want to get out of bed. Global warming my ars.