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6.7L Power Stroke Diesel 2011-current Ford Powerstroke 6.7 L turbo diesel engine

6.7 Cold Start Romps!

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Old Feb 3, 2018 | 10:15 PM
  #1  
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Laughing Gas
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6.7 Cold Start Romps!

Flashback to my old 7.3... started my 6.7 today after sitting outside for 8 hours at -20 but throughout the day it gradually warmed up to -6*... shouldn't be a problem... right?

Fired her up and she romped for a good 10 seconds before "smoothing" out to a rough idle. Was pretty surprised...I've started her many times at -15 without issue.
 
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Old Feb 4, 2018 | 09:51 AM
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My 7.3 would do that until I switched to Rotella T6 full synthetic. Never happened again! Yours is the first 6.7 I've heard of that happening to.
 
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Old Feb 4, 2018 | 09:56 AM
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wow mine too never did that before though glow plugs not working dealer says everything ok ??? same for me 45 seconds . 2017 6.7 16584 miles all stock
 
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Old Feb 4, 2018 | 03:42 PM
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Laughing Gas
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I run synthetic. 101K miles and its a 2015. I just put the key in and turned, didnt wait any time for the glow plugs to be warm since they're supposed to be instant.

Will try again today and see if I can recreate the romping.
 
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Old Feb 5, 2018 | 12:32 PM
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did this today single temp 8 F dealer says he will change out glow plugs and module this could explain lack of power in cold. fingers crossed no fault codes while the truck ran like my old 7.3 dealer could not believe what it was doing lol thank god they witness it them self's
 
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