the van would not stay idle it keeps shutting off. Its certainly not the fuel pump what else can it be?

What is your question?

the van starts right away but as soon as I take my foot off the gas pedal it shuts off. I'm certain its not the fuel pump because it runs as long as I have my foot on the gas.

What makes this problem better or worse?

its shuts off as soon as I take my foot off the gas

How long has your 2005 Chevrolet Astro had this problem?

Just started