I'm going to do a wire/plug/pack inspection tomorrow, but after reading a bunch of threads, I'm hoping I have an injector problem. I'm positive they are the original units. Runs fine from cold start, stumbles on a warm start. I watched Timmy and Sean's video and YOLO'd on a full set of the Denso reman injectors, fuel rail crush washers, and gaskets from MotorWest Performance. Not even sure that's the problem but that's how I roll, unfortunately. Doing one is enough of a PITA so, why not? I will move the coil pack but I doubt that's it. CEL is on but not flashing so I can limp it around to stay ahead of the streetsweepers, right?

Like you mentioned, your first step should definitely be to swap the coil packs. Swap the #1 and #3 coil packs and see if the misfire moves to the #3 cylinder. This will confirm or rule out a coil pack problem.

If the misfire stays at the #1 cylinder, you can pull the spark plug and take a look. If the electrode looks worn, you may as well replace all 6 spark plugs because they are due. While you have the spark plugs out, this would be the opportune time to do a compression test to check the health of all your cylinders. Sean and I have a video for that as well.

If the new spark plug does nothing, then I'd look into replacing the fuel injectors using our video.

Good luck!

Thank you - that is exactly my plan! I went ahead on the injector set while secretly hoping I don't need then (yet). Do you happen to know why a hot vs cold engine affects the misfire? I have barely driven 3 blocks since the misfire began, but is seems to only happen on a warm restart. Thank you guys for your support and videos.

A bad coil might only act up when it's hot.
Could be other things as well.

It's the other things that worry me - but, onward......

So given the lack of time yesterday I got as far as swapping coil pack in cylinder 1 with 5 (meant to do #3 but a nasty cold / brain fog is my excuse - first one since well pre-covid). I didn't realize I didn't have a 5/8 socket, so I couldn't pull the #1 plug. The reason I'm even mentioning this half-assed progress it to mention that the seat for the #4 cylinder (on the #1 coil pack) was full of crusty dust and the metal pin was encrusted with turqouise, uh oxidation?. The other 2 on the passenger side did not have that. Unfortunately, I cleaned and blew it out for the most part before I took the photos below, so keep in mind it was way worse looking than the other two. The #4 cylinder didn't seem affected, but I am wondering if that may point to an issue with the coil pack that was sitting on #1 or some resistance somewhere else?. Hoping the misfire issue moves to #5 or #2. While I was moving the intake out of the way I did clean the MAF - the wire was filthy. I cleaned it last a couple of years ago..... thanks for any insight. Will check plugs next before investing in a compression test kit.

P.S. I'm using an OEM air filter but have been to the desert several times.

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