Random M54 Misfire on Random Cold Start checklist...PROBABLY SOLVED

[Ricky Bobby]

UPDATE: CODES POSTED 3/29/16 on Page 3!!!

UPDATE #2: Maintenance performed on 4/18/16 - Marking Thread title to "probably solved" as it looks like probably the times it has happened have been most likely my own error -

Thought I'd throw up a thread for this although I have yet to scan the X with DIS (will do so in the next day or two)

- Second time in a year that upon first cold start in the morning leaving for work, while I normally wait for the high idle to die down a bit before I start driving, I start to feel a bit of vibration in the car, then some sputtering under the hood giving a misfire, then SES light is on, car runs like crap
- Last time it happened I drove 5 mins down the road to Panera to get coffee, turned off the X, came back out, started up and 100% fine, no SES and running perfectly
- This time I went to the end of my driveway, turned it off, and restarted the X, running perfectly fine from there on out
-Last time I scanned it looked like a few misfire codes, nothing else crazy, but I just cleared them and ignored it to see if it happened again (10 months ago)

There is currently 82k miles on the X, it had about 1/4 tank in it today, always at Shell (93) stations but I only fill up once every 3 weeks or so, maintenance items completed to date since I've taken ownership:
-Plugs replaced with NGK's 2 years ago
-DISA rebuild kit from GAS with new seal
-Cleaned throttle body last year after CCV job while it was out
-Lower intake elbow
-Have an AFE intake with Dry filter and that was last cleaned last year

I run Techron through the tank every 6 months or so, along with Lucas UCL when I can. I have a Mahle fuel filter on my workbench waiting to go in, and an oil change to do. Battery is a 3.8 year old Bosch 900 CCA from Pep Boys that the PO put in before he sold the X, no charging issues.

Any thoughts? I may take to my local indy who has Autologic to diagnose, with the cold weather coming I may have them perform my winter maintenance and solve this issue so I'm not worrying about it.