My blazer runs good when I first start and runs good when Im driving it, but if I drive for a good amount of time with the accelerator down and have to suddenly stop, it will die on me? What could cause this?

 

Suggest removing and cleaning the IAC and the passage ways in the intake as a first stab at this. It may be that the IAC is not moving and will need replaced.

Also check to see that the valve in the center of the intake moves freely. Just remove it and turn it with your fingers...just to see if it is sticking. DO NOT start the engine with the this valve removed!!!!

 

Ok thanks! Ill try that! I dont drive very often so it may be a few days before I do that!