I had this same problem earlier this year. My car wouldn't stay running unless I kept my foot on the gas. I took it in to my mechanic and he said it was just a hose that blew off and he put it back on.
Well now I'm having the same trouble except I forgot to ask him to show me which hose it was. I can't see anything wrong. What should I be looking for and where?
Thanks
EDIT: Oh, my bill says "Air hose off air slide valve" What exactly is that and where do I find it?