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Repo, I can't answer your main question definitively as I only have 500 miles and don't want to idle that long yet. But when my truck arrived at my dealer I requested they enable the high idle before I took possession. They did, assigning it to up fitter switch #1. I don't have a potentiometer so I can't adjust the RPMs but mine runs in the neighborhood of 1500 RPMs. I would say I believe the high idle overrides the auto shutdown. Otherwise I don't see what would be the use of the high idle. My dealer did not charge anything for enabling this. They didn't mention a price and I didn't asked! Thought I'd mention that incase you want to ask your dealer when yours arrives.
my dealer is clueless when I asked for it done. Who is your dealer? Thx
It sucks that Ford doesn't offer this as a option, GM HD trucks can be ordered with this and it is nice as it makes the a/c blow cold on hot days.
LOL, yes you have to wonder. If Ford simply included it in the electronics then it would be a simple matter of just turning it on and you can put it down into the code deep enough that the average Joe cannot get to it
Based upon the number of Diesel trucks they sell (and now the F 150) and the simple statement:
High idle is intended for use in all climates where idling longer than '15' min may cause possible long term damage to your vehicle and void you warranty.
Option U2 007...$85 MSRP
Ford can make a LOT of money on this and so can the dealer.
I'll be installing this when I'm home next week. I plan to use a 22k resistor on the ground for the park switch input. I'll let you know how it goes.
I did the high idle mod (without parking brake bypass) successfully on my 2018 F350. Now I'd like to wire in the relay to ground the parking brake signal so I don't actually have to depress the parking brake. I'm worried about faulting the BCM since the Q-256 bulletin says the circuit cannot source any current. Did you have luck doing this with a resistor? The bulletin mentions using a 20 kohm resistor with a field effect transistor but I'm not exactly sure what this means (electrical engineering isn't my strong suit).
It is plug and play! You just have to find a location to mount the rheostat and it plugs into a factory connector behing the passenger side kick panel where a fuse bos is located. I mounted my rheostat in the lower right hand corner of the knee kick plate where there was enough room behnind it to accept the wiring.
To activate it you just have to have it in park with the parking brake on and dial up the rheostat to the rpm that you want. I use it when I use my ARB twin compressors and I'll use it during any winching operation but I just havn't gotten stuck in this truck yet.
It is plug and play! You just have to find a location to mount the rheostat and it plugs into a factory connector behing the passenger side kick panel where a fuse bos is located. I mounted my rheostat in the lower right hand corner of the knee kick plate where there was enough room behnind it to accept the wiring.
To activate it you just have to have it in park with the parking brake on and dial up the rheostat to the rpm that you want. I use it when I use my ARB twin compressors and I'll use it during any winching operation but I just havn't gotten stuck in this truck yet.
The issue of the Q-256 bulletin saying the circuit cannot source any current, and requiring a 20 kohm resistor with a field effect transistor has still not been addressed. Anyone do this with the resistor in place (FOR THE PARKING BRAKE MOD) and have it work?
Finally got around to installing BD Diesel high idle kit.
Fairly straightforward. Would have been a piece of cake, had Ford sprung for 6”-8” more wire on the blunt cut pass-throughs..... ��
Used UpFitter #4 for trigger.
Put dial on an alum bracket I made inside upper glove box.
Last edited by Faceplant409; Feb 16, 2019 at 08:06 PM.
Reason: Spelling
Finally got around to installing BD Diesel high idle kit.
Fairly straightforward. Would have been a piece of cake, had Ford sprung for 6”-8” more wire on the blunt cut pass-throughs..... ��
Used UpFitter #4 for trigger.
Put dial on an alum bracket I made inside upper glove box.
I don’t think you needed to use an upfitter for the BD kit. Plug it in. And whenever you wanna use it, set e brake.
Run a wire from upfitter blunt cuts to pass through blunt cuts and hook it up to yellow on the BD harness.
I did not use wh/Bl.
Dialed rotary where I wanted it and just use switch.
Last edited by Faceplant409; Feb 16, 2019 at 10:24 PM.
Reason: Added content.
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