Thank you for taking the time to look at my question, love the videos , you rock man. 

two weeks ago i was run off the road to avoid an accident and i went up and over a curb. my honda sits low, but thankfully i was lucky enough to just blow my tire when hitting the curb,. the only other damage i could see when i lifted the car up was my down pipe from the engine is a little pinched together(not completely pinched shut , but like half way). the rest of underneath is practicly untouched, not even scraped. but since that incident, my radiator fan does not kick on now , and after about 10 minutes of driving , the car begins to over heat rapidly. After the car starts, and im idling in nuetrel, it revs from 1.5k  - 2k constsantly. its a 5 speed so when im in any gear the reving doesnt happen. Its only when im not in gear it revs up and down. thank you for taking the time to read my question. Im hoping and willing to try any idea you have on what i should do. thank you so much.