High Idle After Start Up?
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Trailering
Joined: Apr 2017
Posts: 16
Likes: 0
High Idle After Start Up?
I recently went from a 2017 F-350 6.7L to a 2022 F-350 6.7L and while hooking up to tow this past weekend my new truck went into high idle (1K RPM's) about 3 minutes after I started the truck. I then hit the accelerator and it went back to normal idle only to go back to high idle about 3 minutes after that. This never happened on my 2017, so I am wondering if it was trying to regen while in park at an idle or there is something wrong with the throttle body. Any help is appreciated.
Lead Driver
Joined: May 2021
Posts: 5,848
Likes: 3,471
From: Uh oh, CA
I have never noticed mine going into high idle unless I flip the upfitter that I set up for high idle... then again, I don't ever just let me sit and idle either... I try not to even go through drive throughs...
Lead Driver
Joined: Dec 2020
Posts: 8,640
Likes: 2,433
There have been numerous posts, and some threads discussing the exact same concern. Ill edit with links if I find them. As Mwheue said, it appears to be normal and not necessarily related to a regen. Meaning it can happen irregardless of what the DPF% or miles between regens is.
Owners of the 17-19's are noticing this happen after one of the emissions recalls have been performed. I haven't noticed it with my 2019, but like Chad, I don't idle for long. I have thought about letting it idle just to see if it happens.
Owners of the 17-19's are noticing this happen after one of the emissions recalls have been performed. I haven't noticed it with my 2019, but like Chad, I don't idle for long. I have thought about letting it idle just to see if it happens.
5th Wheeling
Joined: May 2019
Posts: 30
Likes: 4
while hooking up to tow this past weekend my new truck went into high idle (1K RPM's) about 3 minutes after I started the truck. I then hit the accelerator and it went back to normal idle only to go back to high idle about 3 minutes after that. This never happened on my 2017, so I am wondering if it was trying to regen while in park at an idle or there is something wrong with the throttle body. Any help is appreciated.
Fleet Mechanic
Joined: Jul 2008
Posts: 1,937
Likes: 1,221
From: Southern Crescent
Perhaps the diesels are trying to keep something cool like the turbo or something?
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Sick 'n Tired
Joined: May 2006
Posts: 2,969
Likes: 47
From: League City, TX
My 2022 did this for the first time this last weekend while hooking up my RV then again while at the dump station (Texas state parks, no full hookups at their sites). My 2017 never did it. I just figured it was doing a regen and let it go.
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