1999 chevy malibu..vacuum hose leak?

[atreyu17244]

i know i have a vacuum hose leak, i just need to find it first. BUT my car has been losing a bit of power when i give it some gas. not all the time, just sometimes. would the vacuum hose cause this? or could it be my transmission? it runs great besides this annoying little problem. i have to drive this car 850 miles this week and i'm scared it might break down. any opinions?
it has 182,000 miles on it. but it's been taken VERY good care of.