Help! Car won't run past 2500 rpms

[Sircnay]

I don't know what the hell it is, it was working fine until I tried to put the a/c belt on there. Turned out the a/c wasn't hooked up the SR20 like the guy said it was. Oh well, so anyway, I take off the belt, put everything back together and now the car won't rev past 2500 rpms no matter what I do. And when I start it, it bogs around 1000rpms and won't fully start until I tap the gas. It idles at 1500 rpms. I don't know what the heck is the problem. Any help?

[NISTECH]

you knocked a vac line off most likely. look at all vac hoses. see if one is hangin

[Sircnay]

It was the MAP sensor... oh god, I hate it when things go wrong...