Does anyone know why the idle is higher in neutral than when the car is in drive? My car has an auto trans. I noticed that in my Predator, the neutral idle is around 760rpm while the drive is set around 560rpm (roughly). I'm just wondering, why the difference? Also... I'd love for my car to stick at 800rpm, idle or drive. If I set it to this with the Predator, when I start my car for the first time in a day, when everything is completely cold, the car idles somewhere around 400rpm more than whatever I set the neutral idle to, before it finally quiets down after warming up for about 2 minutes or so. Why would the engine run FASTER when it first starts? I thought it was worse on an engine to run harder when it is cold instead of better. So the logical sense doesn't seem to be there to me. The only thing I can think of that this would happen is because the engine is trying to warm up quicker, at its own expense? Also, with the idle set higher (800rpm or more) the car surges a lot when shifting into reverse. Is this something that just comes with the higher RPM setting, and is unavoidable? Thanks in advance for any help.