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Hey just to share from my ccv experience in cold temps. I had several issues on cold weather start up generally -20 and below, and eventually after bringing it to the dealer and Indy found out it was ccv gunked up and they said my engine was under way to much vacuum.
Ended up getting the "updated ccv" system on the passenger side bank, driver side never an issue. Update involved moving the ccv tube/valve out from the case cover and the reason it cost over $1000 was because it required a new cover to accommodate the new set up.
New set up works better than old but still having issues. Started up yesterday morning with our first below -30 day and sure enough misfire, and I have A few days before cleaned out ccv and it was FULL of gunk. I even avoid small trips and idling. And I mean FULL With pipes fully clogged as well as the valve.
Anyways I got the p0300 (multiple misfire) as well as misfires in several cylinders. It took second to work out but after I shut off engine twice it was okay. Another bad sign and I will need to get ccv cleaned further. It sucks I spent so much on update but it still doesn't fix the flaw. As jcl always says you must adapt your driving habits or get a heated garage (never ended up getting mine finished whoops). So hope this helps and if u want more pics of update etc I can take some.
Take care
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