Extended idle with deletes

[srjd]

How bad is it to idle over night for around 8 hours if I have the high idle mod and am fully deleted. I also keep my defrost on which seems to rais my idle temps another 40 degrees which I hope helps against wet stacking

[fordpwrstroke7]

If you're not in arctic conditions, what would be the purpose?

[jesilvas]

When your defrost is on, the AC compressor is running as needed, so you're adding heat from the AC radiator.

[srjd]

I'll only be doing it at negative 40 degrees which is pretty much arctic conditions

[6.0f250firstcar]

Originally Posted by fordpwrstroke7

If you're not in arctic conditions, what would be the purpose?

What he said.

[levan4076]

if you run high idle it prevents wet stacking, so you should be good

[travisH3]

Are u in the truck? Or are u talking about it sitting over night without being plugged in and worried about it starting?

[fordpwrstroke7]

I don't have my owner manual in front of me but I think -40 is BARELY past the point where Ford recommends plugging in the block heater. While -40 is cold, it's not necessary if you're wanting to avoid cold starts if you have a block heater.

[blackcloud2k]

Originally Posted by fordpwrstroke7

I don't have my owner manual in front of me but I think -40 is BARELY past the point where Ford recommends plugging in the block heater. While -40 is cold, it's not necessary if you're wanting to avoid cold starts if you have a block heater.

-40 is cold as Chit. Anyone who has ever tried to start a truck in -40 knows that it MUST be plugged in to start, and even if you let the truck idle, you will still be loosing engine temp faster than your gaining temp if you dont have a cold weather blanket on the grill(dont ask me how I know this ) . My truck has idled in temps that cold, but I have never started it that cold. THe coldest I have ever started my truck in with out being plugged in was -15, and it started but was pissed off for a bit. The 6.4 starts alot easier than the older diesels did, but at -40 you are still going to have issues. I would say go ahead and let that thing idle. You will be fine. I have let mine idle for 6+ hrs before with no issues.

[srjd]

I've started my truck cold not plugged in at -40 and let me to you there is no way that is good for the truck. It sounds terrible and I'm sure it's causing a lot of wear. I think on those nights if it can't be plugged in I'll just high idle it also because of the extended idle in the winter I change my oil every 3000-4000km. I know if I still had my 6.0 it would have to idle cause that thing sounded like the world was coming to an end when it started at even -20