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Cummins 6.7 "Cabin Heating"

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gwarrior4u

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Hey,
My truck does (what i consider)a funny thing when it's cold. It starts, and after a minute or 2 the computer runs the idle up to 1500 RPM and it sits there racing until i touch the gas pedal. (This would be during remote start). I guess it's a good feature, but the truck revving like that is rather loud, and I live in a townhouse and it wakes the neighbors. Is there a way to turn the behavior off? I'd be good with just starting the truck and having it sitting there idling while it's warming up. Thanks in advance!
 
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It's called high idle, does that when it is cold so it can warm up faster. I don't know any way of shutting it off (short of getting someone to write you a custom tune). You could always go tap the brake pedal to stop it but not sure if it will start back up again if you leave it?


.
 
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Yeah my 2012 would do that, but only when it was cold outside. Good question about turning it off due to the noise, but I'm also not aware of how to do it without custom programming. BTW the base behavior is mentioned in the manual somewhat, but not how to turn it off, I was just looking at it.

Note, I'm not a diesel expert, but I seem to remember reading that you don't want it to idle to much or too long at lower RPMS; it might have to do with soot buildup. Someone who knows more could jump in and set me straight if needed. I know that doesn't solve your noise issue. There are times when I would run high idle manually when it was cold, like it wasn't even cold enough for that auto-feature to kick in, and I wanted the cab to heat up faster because I wasn't ready to drive yet. [Note: manually engage high idle by turning cruise ON then speed (-) while in park.] In principle I think it's similar to running the A/C in the summer - you want a bit higher RPM. Reminds me of one particularly hot day for example, pulling the fifth wheel from Colorado to Montana with 95+ degree temps outside. In 8-10 hours of driving, we didn't shut off the engine, just turned on max A/C and high Idle during fuel stops
 
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This gives people in bigger Diesel trucks a bad reputation.
Rolling coal, loud exhausts, people who never shut off their Diesels in parking lots, letting Diesel's run in the morning for warm up...... all these things are annoying and gets people wound up.

Yes, we live in a free country and people should be able to do what they want but annoying stuff should be avoided if other people are affected.

We used to live in an apartment complex, and I blended smoothies every weekday 06:00am. That was not nice since the neighbor told me later that it woke him up every morning (took 6month until he said something). I still feel like a self-centered person doing that- I'd rather have friends than exercise my rights.....

Your Diesel and you will be fine not letting it warm up. A quicker engine heat up due to driving is better for the engine anyhow.
 
Will a block heater help reduce the high idle time? I have never had to use one.
 
Brewbud said:
Will a block heater help reduce the high idle time? I have never had to use one.
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I've used them mostly during weeks of subzero temps when truck had to be outside and I had power. Easier to start, and gets the temps up faster. My trucks don't have remote start or seat heat, I just try to get started and going.
 
fuchsroehre said:
Rolling coal, loud exhausts, people who never shut off their Diesels in parking lots, letting Diesel's run in the morning for warm up...... all these things are annoying and gets people wound up.
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Yeah agreed, good stuff to remember, basic courtesy applied.
 
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High idle is normally 1,000 RPM. The driver can use the "Idle Up" feature to increase the RPM's to 1,500. This is discussed in your owner's manual. Turning on the exhaust brake also helps with warm-up.
 
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Not to derail the conversation - but with remote start on the HDs, does the horn honk prior to starting or does it just start?
 
yes, plugging in the block heater will negate immediate high idle, assuming it's been plugged in long enough.
 
elephantrider said:
yes, plugging in the block heater will negate immediate high idle, assuming it's been plugged in long enough.
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No it wont it just shortens the time it runs the warm up… i leave mine plugged in all night and it will still run the warm up and yes the block heater is working
 
CFE said:
Not to derail the conversation - but with remote start on the HDs, does the horn honk prior to starting or does it just start?
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It will honk 2 times unless you change the settings in the radio settings section
 
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moparfan06 said:
High idle is normally 1,000 RPM. The driver can use the "Idle Up" feature to increase the RPM's to 1,500. This is discussed in your owner's manual. Turning on the exhaust brake also helps with warm-up.
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Nope turning the EB switch does nothing it will turn it on its self if needed you hitting thw switch will not engage the EB during warm up
 
gwarrior4u said:
Hey,
My truck does (what i consider)a funny thing when it's cold. It starts, and after a minute or 2 the computer runs the idle up to 1500 RPM and it sits there racing until i touch the gas pedal. (This would be during remote start). I guess it's a good feature, but the truck revving like that is rather loud, and I live in a townhouse and it wakes the neighbors. Is there a way to turn the behavior off? I'd be good with just starting the truck and having it sitting there idling while it's warming up. Thanks in advance!
Click to expand...
Nor running a high idle in the cold is terrible on the engine if you want loud you should hear my 01 when its really cold it idles up to 1200rpm and runs on 3 Cyl (as designed)
 
gwarrior4u said:
Hey,
My truck does (what i consider)a funny thing when it's cold. It starts, and after a minute or 2 the computer runs the idle up to 1500 RPM and it sits there racing until i touch the gas pedal. (This would be during remote start). I guess it's a good feature, but the truck revving like that is rather loud, and I live in a townhouse and it wakes the neighbors. Is there a way to turn the behavior off? I'd be good with just starting the truck and having it sitting there idling while it's warming up. Thanks in advance!
Click to expand...
Tell them to pay your bills then you won't have to get up as early.
 
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