Since I'll be putting on a new intake, I figured cleaning the 103K mile injectors for the first time wouldn't be a bad idea. What the best way and what should I use?
These days I don't think you need to clean them anymore. With the additives they put in fuel now, they should stay pretty clean. I didn't notice any improvement when I went from 100k mile 19# injectors to brand new 30# injectors . YMMV, of course, but I don't know if I'd put a lot of effort into it unless you really think they're messed up.