Cold Startup problems

Im new to this forum, but i have found AWESOME tips, tricks, etc. on here. I have a bit of a prob though. I have a 91 S-10 4.3 that is having a few probs. When i start it in the morning, it idles like crap, then dies. I'll start it again, and basically have to tap the gas to keep it running. During these first few minutes of running, it sputters during acceleration. After a few minutes of running, it is fine. Yet the idle seems to go up and down a little while running. IT seems to also be running rich. My dad said the injectors were "pissing", like both injectors are not seating properly. This happened basicaly out of no where and it quite frustrating. I've had a code reader put on it and just got a coolant temp sensor was bad...well i changed it.....still same prob

Here's what i have done. Fuel filter, PCV valve. Checked Cat. converter. Ran Injector cleaner through it. And i changed the coolant temp sensor.

Help guys...What do i do without forking loads of money into it. Seems it could be a number of problems. But why does it run like poo at cold startup, but running rich all the other times? Confused am I!

my 94 2.2L is doing the same thing although once i let it idle for like 5mins it seems to run alright. sorry i cant help but i would also like some advice. thanks.