Loss of Power in 08 F550 6.4 Powerstroke

Stop and restart?
Maybe replace your fuel filter.
Wish I could give you more..

Bryan, the one time my 2010 F450 (same engine as yours) acted like that it turned out to be one of the EGT sensors had failed, and the trucks computer kneecapped the engine to a very low power output. Could only get about 5 psi of boost out of it. I was able to drive it (slowly) to the next town that had a Ford dealership and get it fixed. The "check engine" light didn't illuminate until AFTER I had turned the truck off and back on. The truck was out of warranty, but that sensor turned out to be covered by the longer EPA mandated pollution controls warranty, so it didn't cost me anything to fix. It wouldn't have been a costly fix even if the warranty hadn't covered it.

If the truck will move without puking fluids, belching smoke, or making scary noises, I'd probably drive it to the nearest service.

I sincerely hope this is relatively minor problem for you, and you are back on the road quickly.

:):)

If you haven't shut it off and retried it you can do that. You can also disconnect the battery for a few minutes and retry. Other then those tow things unless you can read codes you are limping it into the next town.

Thanks everyone for responding and providing valuable information. While I don't have an immediate answer of whether the fix I have gotten is the remedy, as I am waiting out a storm to continue west. Thus the freedom of not having a schedule and can hold in place as storms move around me.

I did wait it out and ended up driving to Tucumcari without any issues. Truck ran flawlessly from my spot at the state line. As I arrived in Tucumcari the truck ran Limp mode again. The test drive after the performed work, the truck performed flawlessly, again. The true test will happen when I set forth on Monday, heading to the Mojave.

Thanks again to those that did respond. Happy New Year!

b

So what was done to the truck in the shop? If it works it could help others.

RAS43 wrote:
So what was done to the truck in the shop? If it works it could help others.

Thanks for asking but I won't know until Monday, as I wrote. But I'll be happy to share whether the repairs/ worked or not as well as the shop.

b

^No, what did the shop do to the truck?
You picked up the truck. They either told you what they did or it's written on the invoice.

We understand that no one will know how long the fix works until suck time has passed.

On another note, the one tool everyone should carry now on the road with newer vehicles is some sort of code reader that can read and clear codes.
That and a smart phone with service can help situations like this a lot. Should be as common as a spare tire. Probably get used more too.

Grit dog wrote:
^No, what did the shop do to the truck?
You picked up the truck. They either told you what they did or it's written on the invoice.

We understand that no one will know how long the fix works until suck time has passed.

Hey, Grit Dog! Please don't pull so hard at the leash. Just sit and wait and you will get your tennis ball.

Well, no one said I picked up the truck. In fact the truck was driven less than 200 feet out into the lot and didn't move until this morning. While you are welcome to the repairs and solutions, but I am more interested in what the result is, since it is my home too. I full time and the delay, in departure, was due to repeated snowstorms hitting to the west and where I am in Tucumcari, I have a nice warm spot free of the weather in the direction I am heading.

After driving 280 miles today, the truck ran flawlessly. Reviewing the cause, the truck went into limp mode after the Exhaust Cleaning Mode came on. Unfortunately it occurred in the middle of a 75 mile section of US 54 with not pull offs or side roads. After allowing the truck to cool, I drove into the next town, 55 miles away. When restarting the truck, it ran fine until the last 2 to 3 miles when it again went into limp mode. This was at the same time as the Exhaust Cleaning Mode activating.

The truck service was a place that was recommended to me, by someone I knew as an over the road trucker. I got a hold of him when I was parked in the pull out at State Line of Texas/New Mexico on US 54. I have a great group of friends and resource. I made it to this below noted shop, Friday night December 23rd, 2016. On the internet for their shop, they would be closed until Tuesday, December 27th. So I waited. I had no other place to go.

Johns Diesel Service
6297 Quay Road AP. 6
Tucumcari, NM 88401

The service and attention to detail was exceptional, as well as the time to explain and offer solutions for considerations.

The diagnosis was the fuel system was compromised, by poor fuel or restricted filter. So when the additional demand for fuel on the hills and grades of US 54, as well as the grade just outside of Tucumcari, the fuel was not able to pass through the Fuel Filter efficiently. The last time I had changed the fuel filter was 19,787 miles previously. Also of note, a couple of fuel fills back I had gotten down to the final alert warning (50 miles left) on my Fuel Gauge. I rarely ever get this far down between fueling. In addition the temperatures were down in the low teens and Diesel fuel was probably low in anti gelling additives. In other words things were cascading downward.

So, being in Tucumcari and this shop is mostly Diesel Trucks and motor homes, the parts were ordered and delivered (get this, from Roswell, NM, the nearest parts supply). Another good example of when I tell people to prepare for these things when traveling in less populated areas for anything on their RVs, whether it is a water pump or Fuel Filter. In addition to many of the parts and filters I do carry, I now have an extra Fuel Filter.

Today, Tues. January 2nd, I headed west towards my winter destination of the Mojave Desert. The truck ran great! The truck has been problem free since I purchased it in the Fall of 2008. So while I was there, at John's Diesel Service, I had additional service work done too. Transmission, Transfer Case, Differential (I have had a slight leak since my brakes were redone in April), Lube. Since the oil/filter were changed less than 3k ago, in April, I passed on this.

I can tell you, I will be putting John's Diesel Service, Tucumcari New Mexico on my stop list, as well as my planned maintenance schedule when I travel through this area. As I often due late fall/early winter, on my way to the Chihuahuan and or the Mojave Desert!

b

I've driven highway 54 from Tucumcari on my way to Salina dozens of times. Yes, that is one desolate stretch of highway. A fews years ago, I had to drive all the way from Santa Rosa NM (I40) to Dodge City via 54 on snow and a weeks worth of sheer ice. One of the toughest, longest drives of my life.

Glad you had the time and resources to get everything worked out. Amazing this is the first problem you had with this truck in 8 years. Thanks for taking the time to update your situation. I've logged Johns Diesel Service into my contact list----you never know.

Yes, definitely put John's Diesel Service in your contact list. They certainly could have jerked me around with this or that, as some dealerships do for big $$. Never even suggested any upcharges. I wanted to repay them in having them do the additional service work.

Not sure why I took notice of the sign, No Services for 75 miles, but thought about it many times as I was getting closer to Tucumcari. Pretty spectacular country through that stretch of the Panhandle of Texas.

Ironically, I was coming from Salina, my home town. Visiting friends.

b