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-   -   rough idle when temp under -30 (http://www.ford-trucks.com/forums/1296738-rough-idle-when-temp-under-30-a.html)

dwh039 02-10-2014 09:22 AM

rough idle when temp under -30
 
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.

T diesel 02-10-2014 09:59 AM

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

eberlestock 02-10-2014 10:37 AM

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.

dwh039 02-10-2014 11:48 AM

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

brickman 02-11-2014 10:10 PM

Could it be the gas blend ?

dwh039 02-11-2014 10:43 PM

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

JohnnyThunder 02-12-2014 08:05 AM

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

KSCRUDE 02-12-2014 09:23 PM

Quote:

Originally Posted by dwh039 (Post 14051960)
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 100k miles on it.

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.:-X22


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