started my truck up this morning...first cold morning of the year...was about -7 celsius, and to my surprise it started as normal, but after about 5 seconds of running the idle jumped up and my exhaust brake was engaged. I thought something was wrong so I shut it down, and restarted and it did the same thing. Got out the manual and apparently my truck has a high idle on real cold starts. Apparently it was working as normal..kinda nice surprise for a change