Cylinder 1 misfire / evap canister

Hey there guys,
I have a 99 4.0 that has experienced some intermittent studders or miss while driving at highway speeds. last time driving it did it and i pulled it into neutral and revved it to maybe clear it out and no issue till i went to leave work and could hear an audible miss that was new at idle. scanned the dtc's and got the 301 code for cylinder 1. A quick check the next morning i found my evap canister plug on the top had been Chewed or rotozipped off. Im assuming its a year model difference that maybe im an early build that does not have the leak detection ??? anyway before i go to swapping injectors and plugs and wires....would a leaking canister cause this misfire issue due to vacuum leak?

new plugs, wire, cap, and rotor installed less than 500 miles ago. the highway speed intermittent shudder was present before the tune up, but had since gone away till now.

I actually ordered a replacement from Ebay because i couldnt find a pre 99' canister. Should be here Monday hopefully it may make my misfire code go away. i messed with the ignition side a little bit just looking for something obvious. i unhooked the spark plug to see if it made a change. I believe its getting spark there was a substantial amount of change when i pulled the wire. more of a dead miss than a slight one as before. I havent gotten a chance to swap injectors around yet to see if it follows one. the intermittent shudder has me more concerned though. i dont see how a spark or fuel related issue would cause that then go away and then come back.

im sorta on the fence if it was truly a mouse or not. the filter media is the only thing that made me think mouse. if it hadnt been for that i would have 100% thought rotozip. you can see the the cutting remnants in the bottom of the picture i didnt notice any mouse poop or anything in that area.

since this is a 99 wrangler going off the service manual it should have had the self purging design that has a hose connection right there, but i guess it could be an early build. it just makes me wonder if a previous owner had issues and tried to vent the canister or something. i dont have any evap related codes, but i also dont know if this design would through a code if the canister was leaking.......lots of questions not so many answers lol

0301 is only code im getting for cylinder 1 misfire. which makes me wonder if the canister is an issue. i dont know how engine vacuum would be related, but thats the only way i could related the code and the hole in the canister.