Engine won't start without using throttle, dies if you don't stay on the throttle

I was driving and my overdrive was off. I have no idea if this has anything to do with what happened, but after I turned the overdrive back on I let off the gas and the my truck slowly died. It only starts if you press the gas and runs fine as long as you stay on the gas. This is a 2001 tacoma with about 111,000 miles on it.
Any help is greatly appreciated. I wanna know how much trouble I might be in.

 

Have the fuel injectors been cleaned? If they're clogged, it'll do that.

 

Yup. Just whatever you do don't try and clean it. If it's shot, it's shot.

 

I think it's like those throttle bodies and intake plenums Ford uses, has some sort of coating on it that's supposed to get dirty and stay on forever. Girlfreind's Taurus even has "DO NOT CLEAN" molded into the throttle body, and the Haynes for my Ranger said do not clean the intake plenum / runners. In the IAC it's probably there for lubrication.

 

something to add......................if you try disconnecting a hose to the iac valve while the truck is running just to spray some cleaner into it...............forget about it!!! you'll be pumping out antifreeze all over the place. i found out the hard way the other day. gonna take my throttle body and iac off the truck later on when needed, but im good to go for now.

 

Thanks for the help guys. I did some hunting in some other forums and found some of the same answers that other people had gotten. The funny thing is, this morning when I started it, it cranked fine and everything was fine except that it is idling at almost half the RPM it used too.