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6.7L Power Stroke Diesel 2011-current Ford Powerstroke 6.7 L turbo diesel engine

Randomly cuts out when accelerating

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Old Jul 5, 2016 | 10:45 AM
  #16  
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I was pulling my equipment trailer and it is definitely worse hauling a load. I know I've read about this issue before. I remember people thinking it was a wastegate issue and that Ford was replacing the turbos instead of just replacing the wastegate. I will see if I can find some of the threads.
 
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Old Jul 5, 2016 | 11:02 AM
  #17  
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Originally Posted by golfmedik
I run Diesel Kleen in every tank. I have thought about the fuel filters but about 4k more miles to go. What's more concerning it that's intermittent and mostly does when hooked to the 5er.
I wouldn't go by mileage for your filters. I'd change them and go from there. But that's me .... for $60 you can eliminate fuel line issues.. I had issues and changed the filters and it cleared up..picked up some junk some where. I would think there would be a error message but I would not be surprised if not.
 
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Old Jul 5, 2016 | 07:20 PM
  #18  
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Planning to do that very thing when I get home... them off to the dealer for the flash.
 
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Old Aug 11, 2016 | 08:36 AM
  #19  
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OK guys let me get in on this. Just passed 36,000 so its time for stuff to break. This trip I have a pronounced shudder/miss/cut out during hard pulls. Went up to a couple different places that were very steep pulling my trailer (prob around 16,000 lbs), the engine (i think) would sort of miss or shudder for awhile and I would lose power, then it would recover but momentum was lost and the rest of the pull was OK but not as robust as expected. I use DK every refuel. This is not the same as the vibration at take off which I've had since new and I guess is one of the u-joints. Has anybody resolved it yet??? Can anyone connect this to over filled oil?? I have made a lot of oil this trip and haven't dealt with it yet. I'm a bit skeptical that it's fuel filter related. If anything goes wrong with this highly complex fuel system it would surely throw a code, right???
 
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Old Aug 11, 2016 | 04:31 PM
  #20  
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From: Georgia
Originally Posted by StanleyZ
OK guys let me get in on this. Just passed 36,000 so its time for stuff to break. This trip I have a pronounced shudder/miss/cut out during hard pulls. Went up to a couple different places that were very steep pulling my trailer (prob around 16,000 lbs), the engine (i think) would sort of miss or shudder for awhile and I would lose power, then it would recover but momentum was lost and the rest of the pull was OK but not as robust as expected. I use DK every refuel. This is not the same as the vibration at take off which I've had since new and I guess is one of the u-joints. Has anybody resolved it yet??? Can anyone connect this to over filled oil?? I have made a lot of oil this trip and haven't dealt with it yet. I'm a bit skeptical that it's fuel filter related. If anything goes wrong with this highly complex fuel system it would surely throw a code, right???
Stan, I took mine to the dealer a couple of weeks ago and had the newest flash done, also the tech scanned it and then ran a test. The truck showed no codes, but during the test, it threw a P1249 code that has to do with the performance of the wastegate solenoid. He tried to find a way to trouble shoot the code, but was only given things to check as far as connection. If the problem were to persist, I am to take it back and the solenoid will be replaced. For the '13 and '14 trucks, this has not been that uncommon of a problem. Reportedly can cause the symptom I have reported.
As for yours and the cutting out, and lower power, have you read these?
https://www.ford-trucks.com/forums/1...wer-power.html

https://www.ford-trucks.com/forums/1...e-shudder.html

We are not the only ones to have these weird things go on. Maybe one of these will strike something similar to yours. In the last one, Joel touches on a bad egr or egr valve for the miss. Also injector. Take a read and see what you think.
 
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Old Aug 15, 2016 | 03:12 PM
  #21  
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OK towed the 5er a couple hundred miles today. Every chance I had I put the pedal to it and could not make the boost go past 22 lbs. And of course that made it pull kind of whimpy. Didn't have any real mountains but I had enough hills that i'm thinking that is the problem. Any input would be helpful. Checked the tube as best I could and it seems normal. Would the waste gate cause that? I'll go on home and take it to a dealer I guess. I knew just as soon as I passed 36,000 it would get me. I haven't had one problem with this truck for the first 37,000 miles.
 
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Old Aug 15, 2016 | 03:19 PM
  #22  
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It should still be under the 100k warranty if it is engine related.
 
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Old Aug 15, 2016 | 05:10 PM
  #23  
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Originally Posted by golfmedik
It should still be under the 100k warranty if it is engine related.
Yeah. I guess that's true. That's the good news I guess.

I still think it's making oil. But I stopped by a jiffy oil change place in PA and told them to suck some out and the guy couldn't get it to read high on the dip stick. I'll check it again in the morning when everything is settled. This is the first time in a week that I've had a level parking spot. I do believe diesel will "boil" out of oil if it's not bio. Bio won't, at least not as well. I got that from the EPA report so it must be true???? Last fill up I couldn't find any bio tag on the pump but I was in PA and I don't know if they have to display the bio content. Be home soon and have time to mess with it between golf games.
 
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Old Aug 24, 2016 | 12:14 PM
  #24  
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UPDATE: I decided to make sure my intercooler clamps were tight. I then checked the bolts holding the intake manifold together and a few of them were loose!

After tightening everything up, I have had no more random cut-outs and random lag starting out for the past 5 weeks.


Anyone experiencing these weird anomalies might want to grab a 10mm wrench and start checking every bolt/nut you see.
 
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Old Mar 15, 2020 | 01:28 AM
  #25  
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Originally Posted by golfmedik
Watch the truck jump at 1100 rpms.. most of the time it does it once or twice, sometimes it does it multiple times.
https://www.youtube.com/watch?v=iZ63XdzxZaY
Sorry in advance for bringing an old thread back from the dead, Just signed up so can't PM, but this is my last hope. I'm having what seems to be the same issue as you experienced golfmedik, but mine (15 F250) will not do it as much on take off as compared to running down the road or getting up to speed after initial takeoff. Seems like it takes spells on being better and then worse. When it's in its "worse" stage I feel like its dependent on how much power I'm trying to demand from the engine. My friend is a Ford tech and has been all over this thing top to bottom and cannot figure it out. I saw that you ended up having the turbo replaced. He was under the impression first it that it was fuel pressure related, replaced a bunch of stuff and it ran good for about 700 miles then started its **** again. Found on IDS it was dropping desired fuel pressure so the PCM is telling it to defuel for some reason. He thought it was losing reference voltage somewhere because he said it would drop out when it would cut out. He put a whole new engine harness on it because we could not find where it was losing it at. Picked it up tonight hoping we figured it out and was test driving it and about 60 miles in it jerked after I did a U turn and was about half way through 3rd gear.
I'm at 228k miles and my turbo sounds great still, builds boost as it should and exhaust brake works, so thinking if this is my issue it might be the VGT solenoid and not the entire turbo.
Just wanted to mainly see if yours acted similar (bucking when accelerating and running down the road, not just initial takeoff) and if the turbo replacement 100% cured the issue.

Thanks in advance
 
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Old Jun 22, 2023 | 12:43 PM
  #26  
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Originally Posted by Mt Jasper
Sorry in advance for bringing an old thread back from the dead, Just signed up so can't PM, but this is my last hope. I'm having what seems to be the same issue as you experienced golfmedik, but mine (15 F250) will not do it as much on take off as compared to running down the road or getting up to speed after initial takeoff. Seems like it takes spells on being better and then worse. When it's in its "worse" stage I feel like its dependent on how much power I'm trying to demand from the engine. My friend is a Ford tech and has been all over this thing top to bottom and cannot figure it out. I saw that you ended up having the turbo replaced. He was under the impression first it that it was fuel pressure related, replaced a bunch of stuff and it ran good for about 700 miles then started its **** again. Found on IDS it was dropping desired fuel pressure so the PCM is telling it to defuel for some reason. He thought it was losing reference voltage somewhere because he said it would drop out when it would cut out. He put a whole new engine harness on it because we could not find where it was losing it at. Picked it up tonight hoping we figured it out and was test driving it and about 60 miles in it jerked after I did a U turn and was about half way through 3rd gear.
I'm at 228k miles and my turbo sounds great still, builds boost as it should and exhaust brake works, so thinking if this is my issue it might be the VGT solenoid and not the entire turbo.
Just wanted to mainly see if yours acted similar (bucking when accelerating and running down the road, not just initial takeoff) and if the turbo replacement 100% cured the issue.

Thanks in advance
Hi there, my van is doing exactly what you are describing. It's only done 64,000 miles so should still be considered "not yet run in". I was wondering if you ever got this fixed and if so how?

Many thanks,

George W
 
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