Apparently my Civic saw Fast and the Furious once too many times. At idle especially, and sometimes in drive and reverse, the car will sit there and REV itself by about 1000rpm. It seems to happen more once the car is warmed up. The car also seems to have a very high idle when it is first started. (About 3000) I have no idea what the problem could be. We recently completed a block swap and the car runs very well other than that, the only thing I thought it could be was maybe a vacuum line in the wrong spot or something. Does anyone have any ideas? Thanks