um i kinda ignored the injector thing because i thought you knew what you were doing and i kinda assumed they were the same as the 4age if you'd swapped them in, so i just shut my mouth on that one because i don't mess with that stuff so i don't know
One way to kinda see if your running rich is that lots of the time you can smell it in the exhaust, now i'm not saying you should stick your nose in the tailpipe and sniff, but usually you can kind of smell it.
And if your running rich you SHOULD NOT be overheating, me-thinks you're running lean, which can be equally bad or worse depending on how lean it is, basically it can cause detonation, aka pinging.
You are killing your car, get it fixed!!!