Recently bought a 12 challenger. Love the car but has a few things that I just have concerns with. No. One is that hemi tick. It has done it since I got it. It had 25000 on it when I got it now 30000. I don't like the tick because I do like to get on the throttle from time to time. Also I don't like the high rev. When I am playing around reving the engine a bit it seems to take a while to come back down to idle. Any ideas would be greatful. Thanks.