yes i know how to work on my car and i am quiet farmilar with hondas. its a M/t. i never use the a/c so i dont think thats the prob. i dont have a tach so im no exactly sure how much it went up. it just feels around 200 rpm. no engine work has been done. it started to rust out the pipe that went to the muffler and thats when the idle went up so i replaced all that.