There used to be a writeup on dodgeram.org but for the life of me i cant find it anymore. It told when and how the 3 cyl idle and high idle worked. I DO remember that the 3 cyl does enable at 15* not 35* like others said.

 

Just get the Adrenaline and have high idle any time you want. Just set the Pl to 0 & high idle.
Also high idle engages until a preset engine temp is reached.

 

I have an ADR with Pulse myself but still want 3 cylinder idle also. Warms up WAY faster.

I also plug my truck in overnight BUT spend 10 hours a day at WORK where the engine cools down fast when its sub-zero out!

 

I used to have the Smarty so my 3 cylinder high idle is there if needed.

 

Well I have a smarty in a 98.5 24 valve and even at 9 degrees I only see the high idle not the 3 cylinder warm up

 

For me it seems 3cyl high idle doesn't kick in unless temps are well below 15f. I actually paid the dealership $100 to enable it.

After using it for a full winter now I don't think it's worth it. Your much better off just starting your truck, letting it run for a couple minutes to settle and taking off with a light foot (1800 rpm's or less). Temps come up much faster this way especially with a cold front on your truck.

 

my truck sat outside for 2 days plugged in and didnt move it, went to start it today and 3 cyl high idle kicked on, my quadzilla said the motor was 14 degrees so try it and let it sit a whole day

 

You're probably right about this, especially since most times I plug in. When plugging in, chances are that even though outside temps are much colder than 15f, my iat temps aren't.

I still don't think it's of much value up here in Alaska. Much better to just get moving with a light foot and put a real load on the engine.

 

High idle parameters below in the PDF....