i had the same problem on mine i looked for eveything i could think of then i found two vacs on the driver side of the intake in the middle there should be 2 i unpluged them and mine runs fine but if you have cruise it may not work after you do this.

 

Ok I replaced that iac valve and four of the injectors today, it starts and idles but I smell gas all in the cab and under the hood, is that normal after doing this? I'm kind of afraid to check for vacuum leaks now.