6.7 high idle

[dieseldan2005]

Just wondering if the 6.7s are supposed to have factory high idle when it gets below a certain temp outside? I thought they did, but mine has yet to go into high idle and it was 19 here this morning. If they do what temp does it have to be?

[Matt121]

Ive been wondering the same thing, my 7.3 would go into high idle automatically when cold enough. Soon as i hit the brake pedal it shut off.

[factoryflood]

My truck hasn't done this in the 11 months I've had it and I always let it warm up during the cold months. I'm going to hook up my high idle when I go home next week for thanksgiving.

The truck comes with all the necessary wires, but you need to hook it up from what I understand.

[dieseldan2005]

Yeah my 7.3 was the same way. As far as the hooking up of it, do you need upfitter switches? i don't have those in mine. I can't believe the ecm doesn't automatically put it into high idle when its cold out. I would like to know their reasoning for not doing that.

[Dave]

Katies dads hasnt done it yet either

[Painted Horse]

The trucks do have a high idle. I don't know what temp it kicks in, But mine has done it many times. I spent several weeks in -25° temps last winter. So I got to see it a lot.

I have not seen that the high does a lot to warm the engine up. I have remote started my truck and let it idle for the 5 minutes or the 10 minutes ( depending on what setting I had it set to) and still see it showing coolant temps of 75-80°. The next day put it in high idle for the same 5 minutes and it's only 2-3° warmer. The extra 300-400 rpm just doesn't do much to increase the temps.

I find if I start the truck, Let it idle for minute to get the lubricants flowing and drive off normal. It warms up much faster. In 5 minutes driving 30 mph, my coolant temps will be 107-115°. Which is 30° warmer than just letting it sit and idle.

Before you go to the trouble of installing the High Idle mode. go out and start your truck on a cold morning and let it idle 5 minutes, See what the coolant temp is. Next day start the truck and hold the throttle at 1100 rpm and see how much warmer your coolant is after 5 minutes. There is very little differnce.

[dieseldan2005]

An update on my high idle. This tuesday for the first time it went into high idle right after it fired. There was no lag time like on a 7.3. It was instant 1100 rpm. I just wish my autostart stayed on longer than 10 minutes now.

[a2designs]

Originally Posted by dieseldan2005

An update on my high idle. This tuesday for the first time it went into high idle right after it fired. There was no lag time like on a 7.3. It was instant 1100 rpm. I just wish my autostart stayed on longer than 10 minutes now.

There should be a setting to max it out at 15 min. Mine has intervals of 5 10 15. Look in the menu under settings and remote start.

[dieseldan2005]

Ahh... I will do that. This truck still has some surprises for me that i have yet to find.