vacuum leak after warm up?

[Indecisive]

hey guys, dunno if anybody has experienced this before, but I'm getting a vacuum leak when the car warms up.

On a cold start, and before it's warm, the car will be in 18in.hg or so vac and run pretty well. When it's warmed up, it goes up to 10in.hg vac and runs like crap.

Does anybody know what this may be?

[RyanAwesome]

use a little ether and spray around any areas where vacuum hoses / gaskets are while the engine is running. if you hear a change in engine rpm while you are praying thats a good idea as to where the leak is. if you dont have ether, you can use small ammounts of propane as well.