OK, I'll document everything I can recall. I'm hoping I'm good to go, but want some assurance. I finished up, and when I started the car, it chugged a bit and took a few moments to start. It ran a little rough, nothing bad. I took it for a drive, it ran fine. That was Friday afternoon. This morning I was going to drive it, started it up and the service engine light came on. It seemed to idle a little rough, I revved it up a bit and it seemed to clear it out. I took it for a short drive and it seemed OK, though the RPM'* seemed to go higher than normal. Under light acceleration as it went through the gears it was up over 2K until I settled into a steady speed. Before I thought it was lower than that. Later on I decided to take it to the parts store for a scan. I think it was while I was there, before going in, I checked things out and noticed that tube going to the rear of UIM was not all the way on. I also checked the plug wires and the #3 wire seemed a tad loose. The guy checked it and noted a vacuum leak, which I told him about the tube loose. He also noted a #3 misfire. He cleared it and told me to drive it. As soon as I left it was chugging pretty bad right from the start. Once I got going faster it was mostly cleared up, but once I came to a stop at a light it would get a bit rough again. I went back and it still showed a #3 misfire. He suggested swapping fuel injectors. I came home, looked things over some more. While at the parts store I also noticed rotten eggs. I wasn't sure if it was mine, but I smelled it once I got home. I didn't really smell it out of the exhaust, just a general egg smell.
So I get on here and found that I need to make sure the #4 plug wire isn't touching the O2 sensor. Well sure enough, it was touching. So I fixed that issue. Next I pulled the #3 plug. It has what appears to be a touch of oil on the white part of the electrode and the ring where the threads start is brown like it'* burnt. So I switched out the plug for another new one. I'm hoping I just got grease from my hands on the end when I put it in. I also was thinking when I put that one in the first time (I redid it also) that it seemed like I didn't need to turn the socket much to tighten it. So I'm wondering if it could have been not in all the way? Well I took it for a drive, and as soon as I started it, the light went out and it drove great. I pulled the plug when I got back, and it was clean. I'm going to test it a couple more times later, but should I be worried about anything at this point?