2004 Astro idle issue...sometimes

I have a 2004 Astro Van that is having intermittent idleing issues. Somes days it will start up just fine and never have a problem and the next when it starts I have to keep the gas petal slightly depressed to keep it running. As long as I am moving it runs fine but if I have to come to a stop it will die unless I keep giving it gas. I may stop somewhere and come out and then it will be running fine.

I have replaced the TPS and while doing that I broke the vacuum line that runs across the engine so I replace it as well. What should be my next step in troubleshooting this? I was thinking about replacing the fuel regulator.

I would also like to check the rest of the vacuum lines. Does anyone know where I can find a diagram of where all they run?

Thanks,

Charley