idles rough?

[Benrs86]

i know, this is a tid bit off topic so if it needs to be moved fine, but, my friend has a 89 honda civic. and it idles rough, and when he comes to a stop, it dies. but at highway speeds, everything is great. vaccuum leak?? thats what my dad told me, and i dont have a vaccuum guage but does that sound right, and i cant hear it. what should i look for? its a 89 so its carbuerated and there are vaccuum lines ALL OVER for EVERYTING. i have never seen so many vaccuum lines. anything else to look for or how to narrow the leak down to a certain hose. i think i will pinch all the lines off and see if it runs better. that should work to make sure it is a vaccuum leak right? thanks, Ben