This forum isn't that active but I know how annoying it is to not get responses on this type of thing so...
Have anyone ever changed their own fuel injector here? Not that I know of...
Part for fuel injector is 353102B120. Should I change only one or all of them at the same time? They don't look cheap. I would probably just do one unless someone told me to do them all. Although, doing them all would prevent doing it again anytime soon.
Also is aftermarket injector OK? 50% of the price of OEM. It's probably OK but OEM may be the safer bet. Are you just trying to get back on the road or are you trying to restore performance?
I did a quick search elsewhere, this was all I found.
"its involved...had to remove, intake,catch can,bumper,cold pipe/fittings, throttle body,numerous plugs that are hard to reach/unconnect, serp belt,alternator to swing forward to make room to remove the fuel rail, rad hoses, 4 hoses off the back, 1 of which is coolant from the oil cooler/filter mount. Lots of small odds and ends...removing and installing the injectors themselves only took about 20 min tops...ended up being a 10+ hour day with painting the cold pipe and intake black, and front emblem black as well."
Seems like a lot of work just for injectors but I've never pulled any on a DI engine.
Sorry to not really be that much help.