2002 Montero Sport every time I drive and come to a stop or a drive through window and my truck idles, the truck feels like it wants to take off and the rpms jump, then it levels off for a few seconds, and jumps again. also it smells like burnt oil from time to time. the check engine light came on and I took my truck to auto-zone and they diagnostic on it they said I had something called a vacuum seal leak, the part is cheap to replace I just dont know how or where to even look to replace the seal, I have changed the alternator and installed a stereo system so I have that know how to do some basic mechanical work I am just not familiar with the terminology can some please help maybe upload a pic and point it out or give me some advice thanks.

 

whats the name of the part you have to replace?