My astro is stalling when in idle or at a stop ligth

What is your question?

My astro is stalling when in idle there is no check engine ligth comming on I toke it to a shop for a dignossis and mechanic set it was the computer so I replced it and its still stalling then I toke it back they said it was the throlled body replaced that and its still stalling I want to see if anybody has a hint off what it could be or what should I check thanks.