Which of these two likely caused a misfire?

[WarrenBoostit]

Today, I was planning on cleaning out my cold air intake filter, and I noticed my hot side PCV valve was making a vibrating noise. It was an easy swap for a new valve and hose, and I installed (what I thought) was a now clean and oiled filter. This is my first time attempting to clean a filter, and I was worried I may have gone overboard oiling it, I use a K&N recharge kit with the cleaner and oiler.

After taking it out, I noticed it was a little hesitant, and after a WOT pull, I had a CEL flash for a bit and go away. Scanning it showed it was a Cylinder 4 misfire.

My best guesses are...
- I overoiled the filter (note, i did wipe it down to reduce the oil levels as I had a fear of over oiling afterward, and it wasn't at dripping level). Curious to know your thoughts on the amount to use
- The tune was recorrecting to the new PCV as there may have been an exhaust league prior
- Ford gave me the wrong valve (KR3Z-6A666-A) or hose (FB5Z-6A664-A)

I'm mid diagnosing another issue, and this misfire reset my OAR and put me in a pretty bad mood, so any advice would be greatly appreciated!

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Black 2018 SHO Non-PP | GH e30/AO Tune | PPE Catted Downpipes | DG2 Trans Mount | M-12405-35T plugs at .026 | 170 Tstat | 3 bar | H&R Springs | XDI-35 | Badges removed | Chrome delete | Fuel-it Bluetooth ethanol analyzer | GH IC | EPP Gen2 CAI | Noisemaker delete | MSD coils | Ceramic coating | Window Tint | EPP Hot Pipes | Black AR924 w/ General GMAX AS 05 255/45r20 | MRT axle back w/black tips

 

[WarrenBoostit]

Well I'm a *****. I was not supposed to oil that filter, it was a dry filter. I washed it through twice, but I'm worried I may have ruined it, and EPP is in the middle of getting a new supplier for the filter so I can't just buy another dual input (can't say f l a n g e ?) dryflow filter. I'm guessing either I choked the engine into the misfire, or preignited it into one with the oil. Just praying I got all the oil out.

 

[SHOdded]

call aem and find out what to do if you mistakenly oil one of their dryflow filters. they were developed by k&n.

 

[yaycandy]

Ive had spark plugs crack at wot. And you can only tell when the spark plug is upside down or in the installed position

 

[ShatteredMJ]

Shove dirt all over the filter until it’s clunky and then soak it in detergent soap and hot water. You know the kind that gets sludge off kitchenware. You can get a soft sponge and rub the filter gently. You’ll see all the red oil on the water. Do it again to make sure all oil residue is gone.

Another method is to put the filter facing up on the floor and spray a soft engine degreaser on it until you see oil draining to the floor. The K&N cleaner in the “recharge” kit does just that. Then wash it with soap as you would a dirty filter.