I just did the 50¢ mod on the UVCHs, but didn't see any signs of arcing and had a very minor gap compared to some pics I've seen. My truck was randomly throwing the SES and immediately after it came on she'd drop what felt like a entire bank of cylinders. Its had a slight miss at low-mid RPMs since purchased, I'm hoping its an injector (they are relatively cheap and definitive). If someone in the area Pt. Charlotte-Marco has an AutoEngenuity they'd rent or come run it if you don't want it out of sight, I'd be most appreciative. If you have another tool that would pull codes etc that you think would help, please PM me and I'll call back right away. I don't really feel like I can trust the old girl until I am sure of what caused the issues. I live in S Cape Coral.
Thanks