Navajo doesn't want to idle

[uwbradley]

On my way home from work today, my 91' Navajo decided that while stopped at stoplights in drive, that it wants to die. The idle starts to drop as I slow my truck down, and if I don't give it gas at the dead stop (with my foot on the brake) the volts will drop, and the idle gives up. The lights dim and the whole 9 yards, unless I keep my foot on the gas. What could be causing this?

 

[MrShorty]

Dirty IAC valve si my first thought.

 

[TPLYNCH]

If you shift into neutral, will it idle normally? Does it only happen when the engine is warm?

 

[uwbradley]

No, it wants to die then too. I think it is the IAC, after doing a search on it- I have all the classic symptoms. Weekend project!