wife asks why Ford has a "limp mode" - Ford Powerstroke Diesel Forum
6.7 Performance Parts Discussion 6.7 Performance Parts Discussion

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Old 10-13-2012, 05:30 PM
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wife asks why Ford has a "limp mode"

My truck needs help. And Viagra won't fix a Ford 6.7 limp mode.

At 35,000 miles my 2011 6.7L 'check engine' light comes on. Runs fine. I was on highway so stopped at another dealer then bought from, they clear the code and say if comes back on might be problem with DEF equipment.., Nox.., DPF who knows, but had other trucks with similar problem so felt they could fix if happened again.

So the light comes back on about week later, along with limp mode, and light saying 'drive to clear exhaust' or something like that.

Now after searching internet I'm having no problem finding others with similar complaint.

I currently have a 6.0 in shop after oil cooler / EGR meltdown (well cared for and only 85,000 miles) and I've decided the aftermarket is where I need to focus to get this 6.0 back on the road...and dependable.

Planned to leave my 2011 6.7 stock because satisfied with power. But I'm now more concerned about the truck lasting, as I'm not confident Ford will take care of this 6.7 if problems are starting to develop ( i.e. - 6.0 fiasco)
so I'm wondering if doing all those time honored traditions of past motors should be done now - EGR delete / aftermarket exhaust (goodbye DPF/DEF) / tuner -if only for the sake of potentially saving the engine. Don't want a trash engine when hit 100,000 miles....and more important not left stranded in -10F, with a 14,000 trailer, on a mountain road. If my wife is running that truck when that happens it won't be the only limp mode around our place.

So what mods are others doing on the 6.7 and what are your results so far?
I Know I will void a warranty. But I'm beginning to think I can keep this truck on the road longer via the aftermarket.
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Old 10-13-2012, 05:37 PM
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Delete it. From what ive gathered the DPF and components cause more trouble than benefit.

This may convince you, about a 6.4 but its the DPF in general. It is worth watching the entire video.

6.4 CATASTROPHIC FAILURE - YouTube
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Old 10-13-2012, 06:29 PM
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Quote:
Originally Posted by Guardian29 View Post
Delete it. From what ive gathered the DPF and components cause more trouble than benefit.

This may convince you, about a 6.4 but its the DPF in general. It is worth watching the entire video.

6.4 CATASTROPHIC FAILURE - YouTube
Thank you. I watched it. Troubling. Would like him to describe the exhaust on the 6.7 the way he explained the 6.4 - differences/etc, and if seeing any damage of the 6.7 engines / turbos due to the way the DEF / DPF can malfunction. I have also noticed more fule consumption on my 6.7 which I never really processed before looking at this. They cleared the code when first came on with a hand held unit they plugged into the truck. Watched them do it. Now back on and with the other warnings as discussed.
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Old 10-13-2012, 06:42 PM
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SCR 2011 6.7L POWERSTROKE SELECTIVE CATALYST REDUCTION - YouTube
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Old 10-13-2012, 09:04 PM
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The DEF system isn't nearly as harmful to the engine as the 6.4 system was but It's still not bad to delete it. I would take it to your dealer, get them to make the truck right, then look into mods
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Old 10-14-2012, 07:11 AM
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Quote:
Originally Posted by atvrider93 View Post
The DEF system isn't nearly as harmful to the engine as the 6.4 system was but It's still not bad to delete it. I would take it to your dealer, get them to make the truck right, then look into mods
The post just before yours links the powerstroke help video on the 6.7. Bill in the video is positive about the 6.7 but it still sounds like the way the DPF works, the way it is 'cleaned', may be similar to the 6.4??

Anyway, my concern is what kind of valve / turbo damage may already have occurred. Right now I expect Ford would find a componenet in the exhaust that needs repair/replace, but being the truck otherwise is running that there would not be any reason for them to inspect - check valves / turbo. That's just my guess, however.

I wonder if I had another shop help with that inspection/assessment of valves / turbo and if any unexpected findings to then go back to Ford - as then may need those issues repaired under warranty might be better?

Then once everything checks out as far as valves / turbo / etc, doing that before any type of warranty voiding mods, as you said. I probably like to hear from independent qualified diesel business that those other componenets have been checked and are OK. This is nothing personal with Ford, only business.

Hope to hear from readers. Yesterday I briefly thought not to start this thread, just to read along and not bother with responding to others. But then realized only way I knew of some of these problems was by reading others posts in forums. So hope if others have information will share with us. Thanks to you guys for responding to my posts.
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Old 10-14-2012, 08:15 AM
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In all honesty man..

I think your spot on for what you should do..

Take the truck to a Reputable diesel shop in your area.. Hell, take it to 3... You may have to pitch out some money.. $100-$200 to get them to do a thorough inspection of your truck.. but if what they find show signs of parts needing to be replaced for a catastrophic failure to be avoided.. than its money well spent, take their findings to ford and shove it down their throat until they repair what needs to be fixed... If they tell you that everything checks out ok, no damage has already been caused... Then its peace of mind, and money well spent..

After all that man.. Get that government regulated S**t off your truck.. and never look back.. And about voiding a warranty... Your only affected the internals of the engine, and exhaust.. Its not going to void your entire warranty.. If you drop an alternator.. can they really tell you that deleting your DEF caused that alternator to fail??

Thats just my .02 .. Take it for the penny its worth.
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Old 10-14-2012, 12:37 PM
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Quote:
Originally Posted by BubbaJ View Post
In all honesty man..

I think your spot on for what you should do..

Take the truck to a Reputable diesel shop in your area.. Hell, take it to 3... You may have to pitch out some money.. $100-$200 to get them to do a thorough inspection of your truck.. but if what they find show signs of parts needing to be replaced for a catastrophic failure to be avoided.. than its money well spent, take their findings to ford and shove it down their throat until they repair what needs to be fixed... If they tell you that everything checks out ok, no damage has already been caused... Then its peace of mind, and money well spent..

After all that man.. Get that government regulated S**t off your truck.. and never look back.. And about voiding a warranty... Your only affected the internals of the engine, and exhaust.. Its not going to void your entire warranty.. If you drop an alternator.. can they really tell you that deleting your DEF caused that alternator to fail??

Thats just my .02 .. Take it for the penny its worth.
Thank you. That's what I'll plan to do.
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