6.7 dies while towing
Cargo Master
Joined: Feb 2015
Posts: 2,338
Likes: 255
From: Livermore Ca.
Having a tuner complicates things. You don't know what is happening without data logging.. Tunes have been the cause of all sorts of issues. I would dump the tune and see what happens. It may be interference with the computer in the truck.
Logistics Pro
Joined: Nov 2001
Posts: 3,788
Likes: 103
From: Georgia
I would return to stock and still may if I have to. I can’t blame the tune for the over boost because the tune was on for a couple years before it started. But, I get I could blame it for preventing the codes that would tell me what is happening. Putting that POS back on at my age (80) is a lot if work. I keep trying to find an easier solution or a tech that can figure it out without codes.
FTE Legend
Joined: Mar 2017
Posts: 31,970
Likes: 9,197
From: Western NY
I would return to stock and still may if I have to. I can’t blame the tune for the over boost because the tune was on for a couple years before it started. But, I get I could blame it for preventing the codes that would tell me what is happening. Putting that POS back on at my age (80) is a lot if work. I keep trying to find an easier solution or a tech that can figure it out without codes.
4th Gear
Joined: Jul 2020
Posts: 4
Likes: 0
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4th Gear
Joined: Dec 2023
Posts: 4
Likes: 1
My 6.7 power stroke shut off when I’m putting a load, but will crank right back up. I’ve changed the high-pressure fuel pump, low pressure, fuel pump and fuel regulator. Truck drive fine unless I’m pulling a load going uphill. As long as I stay under 20 PSI going up here with the load, the truck will keep running if I go over 20 PSI for a while the truck was shut off truck been deleted and tune. I have fass ride low pressure fuel pump installed also. H&S tuner. Only code I have is p007D charge air cooler sensor circuit high
FTE Legend
Joined: Mar 2017
Posts: 31,970
Likes: 9,197
From: Western NY
My 6.7 power stroke shut off when I’m putting a load, but will crank right back up. I’ve changed the high-pressure fuel pump, low pressure, fuel pump and fuel regulator. Truck drive fine unless I’m pulling a load going uphill. As long as I stay under 20 PSI going up here with the load, the truck will keep running if I go over 20 PSI for a while the truck was shut off truck been deleted and tune. I have fass ride low pressure fuel pump installed also. H&S tuner. Only code I have is p007D charge air cooler sensor circuit high
Air Intake / Charge Temperature Sensor
2nd Gear
Joined: Mar 2024
Posts: 2
Likes: 0
I have this exact same problem. Just trying to get this figured out so i don't have to trade my truck in.
Did anyone figure out how to solve this?
Did anyone figure out how to solve this?
- I have a 2017 F250 with the 6.7
- When towing only, and when going up hill, the transmission will downshift to maintain vehicle speed
- Engine oil 212F, Trans oil 208F, Boost over 20 pounds
- Engine gives "reduced power" warning, but engine immediately shuts off
- No codes or check engine lights on my display
- Engine starts right back up and truck drives normally afterwards
- This only happens when the engine downshifts, has a heavy load behind the truck, and the truck is trying to maintain speed
- Not a fun experience when towing on the highway
- I noticed if I drive slower (60 mph vs 65 mph), I won't get the event
Last edited by CJFL; Mar 12, 2024 at 05:05 PM.
2nd Gear
Joined: Mar 2024
Posts: 2
Likes: 0
I have had this truck to 2 separate Ford Dealers, both of which cannot find a code stored on the computer. I'm not sure if the code is somehow clearing itself, but 2 separate "Master" diesel techs seem to be baffled at what I am experiencing. These are older gentlemen who look like they have been doing it for a while.
I read on another forum that replacing the driver's side fuel rail might solve my problem, but no reason was given as to why. I looked this part up , and it looks like an OEM replacement is less than $200. https://www.getoemparts.com/oem-part...EaApiPEALw_wcB
Do you think replacing the fuel rail is worth a shot? What would go wrong on a fuel rail, and why the driver's side specifically?
I did have the fuel filter changed right before this problem started happening. Do you think swapping a fuel filter again would be a good course of action?
I read on another forum that replacing the driver's side fuel rail might solve my problem, but no reason was given as to why. I looked this part up , and it looks like an OEM replacement is less than $200. https://www.getoemparts.com/oem-part...EaApiPEALw_wcB
Do you think replacing the fuel rail is worth a shot? What would go wrong on a fuel rail, and why the driver's side specifically?
I did have the fuel filter changed right before this problem started happening. Do you think swapping a fuel filter again would be a good course of action?
Last edited by CJFL; Mar 12, 2024 at 05:41 PM.
Hotshot
Joined: Oct 2015
Posts: 19,726
Likes: 12,873
From: Wyoming
FTE Legend
Joined: Mar 2017
Posts: 31,970
Likes: 9,197
From: Western NY
Another thing to consider are the factory quick connect fittings, make sure there isn't an O-ring that folded over and is not making a proper seal with the male fitting of the fuel line. I remember reading that somewhere also...
The fact that it was acting fine until the filters were changed says that it has to do with that. Factory Motorcraft filters?