I idle at like 2000 rpm and need to bring it down. Is there a screw somewhere that adjust this?

 

on your throttle body, but your shouldn't be idiling at 2k anyways, list of modifications, are you running a chipped ecu?

 

I bought the engine from the guy and he told me there was itr camshafts and arm can covers. That was it. I cleaned the throttle body and entire inside of intake manifold. And no, I'm not running a chipped ecu I don't think. Any way I can tell?