Over the past years I have owned this rig I have realized that on first start up the rig idles at a different rpm with respect to the temperature outside. In the summer time it revs p to 1500 rpm and in winter especially now when it's 32 degrees it only revs up to around 1000rpm. Is their something wrong with my rig? Or is the car programmed to do that? I also noticed that when I turn on my a/c ten rpm rises to 1000rpm for a a while then goes down? Are you guys experiencing this?