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Discussion Starter · #1 ·
In April we received a letter from Ford Motor Corp. for a recall regarding overheating of the exhaust system. This letter was accompanied by a small card reading "Attention New Exhaust System Temperature Monitor Feature 6.4L F-Super Duty". This card is according to the letter to be kept with the owner's manual.

This is what the card says:

"Your vehicle has been equipped with a new Exhaust System Temperature Monitor that will flash the Check Engine Indicator (see page 13 of your Owner's Guide) and limit the engine power if an exhaust overheat condition is identified. The limited power will allow the function of power steering and braking, but will limit vehicle acceleration. If the check engine light flashes, pull over to the side of the road as soon as safely possible and contact your authorized dealer.

Depending on the severity of the over-temperature condition, the vehicle may or may not restart after cycling the ignition OFF. If the vehicle restarts, there may be limited power, or there could be full function. If the exhaust over-temperature condition reoccures the Check Engine light will flash again and the vehicle will again have limited power. Again stop the vehicle as soon as safely possible and contact your authorized dealer to have the condition repaired. Please keep this letter in your glove box for future reference.

8C3J 19B146 AA"

Since you're not supposed to tow within the first 500 miles we received this recall without much of towing experience until we brought the truck to that servce (about 1,500 miles).

Unfortunately we had to realize that after the re-programming (temperature monitor) our truck started significantly loosing power (regeneration mode ?) after about 50 to 60 miles while towing our horse trailer (4-horse slant w/ LQ - approx. 15,000 to 18,000 depending on the number of horses). First time we were caught with this was on the middle lane of the Florida Turnpike when I hauled 2 of our horses. Semi trucks honked their horn (maybe they thought I was fallen asleep...) and we were lucky when we could pull over to the right lane. No acceleration possible but we could go with about 45 mph until we could accelerate again after about 10 minutes. By the way: there was no Check Engine light flashing. In that case we would have stopped.

We have to go this tour once or twice a week (125 miles each direction) and it keeps happening once or twice on the way to and on the way back. I consider this so far not more as an inconvenience but we are worried about hauling our horses with this truck away from our backyard.

I'm just wondering if the (un-objected) acceptance of the recall letter and the addendum to the owner's manual (see above) will wave our rights when something is really happening. Who would (financially) be responsible to haul our horses back home (or to the nearest stable) when we get stuck, let me say in the Carolinas? How fast could we get a towing service when we got stuck on the Florida Turnpike at 95F or more in summer ? Will my horse insurance accept the higher risk of hauling the horses with this truck ?

Does anybody have experience with this and maybe can give us some advice ? I would do anything to keep this truck since beside this issue it is just an amazing truck (w/ its new interior and the bold looks of the exterior..).

Thanks guys.
 

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I would take the truck in to see your ford service department.
 

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Discussion Starter · #4 ·
Well, I took it in three times so far (2 different dealers in our area). They know about this problem in general from TSB 07-4-11 but they are supposed to limit their test drive to 12 miles and thus cannot "duplicate" my problem. I even took it in with my trailer hooked (no horses of course....). Because I had the sudden power loss only under heavy towing...

Is my case unique? And can I hope to get rid of this problem when they eventually will buy this truck back just replacing it with another F-450? I'm just wondering if another F-450 or an F-350 with the 6.4L Diesel would make any difference. If there is anybody out with heavy towing experience please let me know (trailer should be 15,000 to 19,000 to compare...).

On the other side a F-350 V10 DRW CC is supposed to not tow (5th) more than 16,100. That would leave me with just 1.5 horses /ubbthreads/images/graemlins/frown.gif.
 

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Sounds like normal regen to me. Or at least thats how mine acts. I wish they had a light to warn of upcoming regen. Kind of embarrasing when you pass a bunch of semis on the way up the mountain only to be re-passed by them moments later. Power loss seems more significant than owners manual leads you to believe. I think partly because the fan locks up. Recall had no effect on this characteristic.
 

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[ QUOTE ]
Well, I took it in three times so far (2 different dealers in our area). They know about this problem in general from TSB 07-4-11 but they are supposed to limit their test drive to 12 miles and thus cannot "duplicate" my problem. I even took it in with my trailer hooked (no horses of course....). Because I had the sudden power loss only under heavy towing...

Is my case unique? And can I hope to get rid of this problem when they eventually will buy this truck back just replacing it with another F-450? I'm just wondering if another F-450 or an F-350 with the 6.4L Diesel would make any difference. If there is anybody out with heavy towing experience please let me know (trailer should be 15,000 to 19,000 to compare...).

On the other side a F-350 V10 DRW CC is supposed to not tow (5th) more than 16,100. That would leave me with just 1.5 horses /ubbthreads/images/graemlins/frown.gif.

[/ QUOTE ]

If they told me they had to limit the test drive to 12 miles, I would tell them that I'm about to limit my driving to 12 miles. This is garbage, tell them that your purchase price of the truck more than allows for more than 12 miles of diag time.
 

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Discussion Starter · #9 ·
No, not towing with gauges...just the ones on the dashboard. Surprisingly they look pretty o.k. when our F-450 looses power. But it makes a significant difference if we're hauling the trailer empty (about #13,800) or have the horses on it (up to 19,000).

With the trailer loaded we can also predict that after approximately 50 to 60 miles we have the issue of power loss. With the trailer empty it normally takes up to 100 miles or even more before we get into trouble. So my guess is that it has something to do with the fact that the engine is going to be on the edge (I'm just curious how this truck would behave when it get's to the limits outlined in the specs...does anybody have experience?).
 

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From what I've read, Ford claims the regen process should happen at least once per tank full of fuel. Not sure under what conditions would increase the regent process, but it safe to assume from Ford's statement that it will happen more often when towing since your using more fuel. The new F-450 and the 6.4L PSD are new to the market. So you may be one of the first, on this site anyway, that has some real heavy towing experience with this new truck/engine. Remember, not everyone that owns a Ford diesel truck is reading this site (I wish they were). And based on my experience when I got my 2003 F-350 with the then "new" 6.0L PSD, the service and parts departments where not prepared to service the new engine, let alone stocking parts for them (they were still in 7.3L mode). The dealer's were more then happy to sale them, but someone forgot to bring the techs that would be working on them up to speed on how to service them. This may be the case with the new 6.4L engine. It's new and the dealership service departments have little to no experience working on them yet, so they are going by what they have via TSBs they have. So keep asking and checking. The learning curve on this engine will start to build and questions will start getting answered. I know that doesn't answer your question now, but hopefully more people will be chiming in with their experiences and a knowledge base will start to form.

By the way, all the stock gauges on the 6.0L trucks (except the oil pressure "switch") are sanitized by the PCM. In other words, your not getting a direct signal from the sensor to the gauge. The gauges are networked into the PCM, so your seeing what the PCM wants you to see, not what is really coming off the sensors. It's a fair bet that the 6.4L gauges are set up the same way.

Good luck, I hope you get your issues solved soon.
 

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If you are using all the power that this engine can produce, then of course the power loss during regen will affect driving. Mine was the same before and after the recall. Hard to notice, unless you are pushing it hard.
 

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My dad's new F-450 has 15000 miles on it and over 14000 miles have been towing over 25K lbs. He has had no problems with loosing power during the re-gen process.

I would take your truck in and get Ford to fix it. If they will not go for a test drive to confirm the problem talk to the GM. If that does not work go to another dealer and hopefully they will work with you. If that does not work file a complaint wit Ford.

Good luck..
 

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I am just wondering if you got the 450 with the 4.88 gears or the 4.11?
dident they de-tune the 4.88 so they would run cooler ?
 

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Discussion Starter · #15 ·
you are right, I got a 4:30 ratio what according to the specs should easily tow the trailer what I have.
 

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Discussion Starter · #16 ·
[ QUOTE ]
From what I've read, Ford claims the regen process should happen at least once per tank full of fuel. Not sure under what conditions would increase the regent process, but it safe to assume from Ford's statement that it will happen more often when towing since your using more fuel. The new F-450 and the 6.4L PSD are new to the market. So you may be one of the first, on this site anyway, that has some real heavy towing experience with this new truck/engine. Remember, not everyone that owns a Ford diesel truck is reading this site (I wish they were). And based on my experience when I got my 2003 F-350 with the then "new" 6.0L PSD, the service and parts departments where not prepared to service the new engine, let alone stocking parts for them (they were still in 7.3L mode). The dealer's were more then happy to sale them, but someone forgot to bring the techs that would be working on them up to speed on how to service them. This may be the case with the new 6.4L engine. It's new and the dealership service departments have little to no experience working on them yet, so they are going by what they have via TSBs they have. So keep asking and checking. The learning curve on this engine will start to build and questions will start getting answered. I know that doesn't answer your question now, but hopefully more people will be chiming in with their experiences and a knowledge base will start to form.

By the way, all the stock gauges on the 6.0L trucks (except the oil pressure "switch") are sanitized by the PCM. In other words, your not getting a direct signal from the sensor to the gauge. The gauges are networked into the PCM, so your seeing what the PCM wants you to see, not what is really coming off the sensors. It's a fair bet that the 6.4L gauges are set up the same way.

Good luck, I hope you get your issues solved soon.

[/ QUOTE ]

Thank you so much for your expert input...I really appreciate this...
 

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Been driving only Ford trucks for 34 years, will never own another after the 7.3 retires. Not hard to believe that the American car companies are struggling. Sorry for the OT, but I was hoping for the best in the 6.4
 

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[ QUOTE ]
My dad's new F-450 has 15000 miles on it and over 14000 miles have been towing over 25K lbs. He has had no problems with loosing power during the re-gen process.

I would take your truck in and get Ford to fix it. If they will not go for a test drive to confirm the problem talk to the GM. If that does not work go to another dealer and hopefully they will work with you. If that does not work file a complaint wit Ford.

Good luck..

[/ QUOTE ]

how did everything go with getting the rearend problem fixed on your dads f-450? Hope everything is working out alright.
 

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They replaced the rear end with a new one from a truck on the lot. She is back to running like new.
 

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[ QUOTE ]
Hell, I would rather have the flames. Are you guys towing with guages, I would be interested to know at what engine temp this thing kicks in.

[/ QUOTE ]

No Open Flames in South Georgia North Florida righ now. Thank you for not Flaming!!
 
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