Ok before I tell you I want to say this problem happens randomly and only when I start the car up. Basically my car revs up and down fairly quickly by about 500rpm. After like 30sec. To a minute it idles normally and runs fine. Though what's causing this? It sounds like my car has monstersously huge cams in it randomly!

 

I had a cracked vacuum hose that caused mine to do that, it's a pretty easy fix

 

vacuum leak like stated also possible iac sticking.

 

Yeah, sounds like a split vacuum hose, I had that problem last year. Check the ends of all the hoses under the hood, if the split isn't too long you may be able to cut the hose shorter.

 

vacuum hose should be your fix