Need some help, car starts but dies immediately

[98GTfromGA]

Recently my car started acting up, it cranks and runs for a few seconds and then dies. During this time it idles really rough. I just got the car back from being dynotuned for my supercharger. Its got a s-trim on it. It drove perfectly from the shop to my house. I have looked at all the vaccuum lines, the maf, and hoses etc. Checked the oil and the plugs and I can't figure this one out.
Thanks,
John

 

[Kilgore Trout]

Most likely IAC.

 

[Bolt on 5.0]

yeh, start the car, or have someone start it. AS soon as it starts, tap the IAC lightly with a wrench or hammers handle. If it runs then there is your problem.