power loss 6.4l powerstroke
 

On two separate occasions my '08 SD has tripped off the cruise control, lost power and started bucking like a mule. It wouldn't accelerate over 40mph regardless of throttle position. The boost guage would rise slightly and then drop rapidly with the power loss, but no check engine lights would trip. The truck has 40k on it, had plenty of fresh fuel, is up to date on filters & maintenance, had Ford cetane booster in it, etc. After nursing it to a safe spot I shut the engine off and restarted it and the problem was gone and hasn't returned again. It coincidently happenend while heading in to a stiff head wind. My area dealerships have no clue, but are more than happy to check it out (drive it down the road at a price of $85.00 / hour) in the attemot to duplicate it. Any suggestions? I have better things to spend money on.

i dont have any idea what it could be do you still have the dpf on it

yes. There have been no modifications madde to it. It is still stock.

Going thru the exact same thing right now - Ford Customer Service told me 2 different times that it is 'normal operating characteristics'. One of them even told me its going to get worse the more miles I put on it. Somebody posted a bulletin sent out by Ford on here somewhere (I will see if I can find it for you). Mine was in the shop from the middle of sept to around Christmas time. They could not duplicate the problem. The powerstroke has a 100,000 mile warranty so you shouldn't be paying them to look at it. I'm in the process of getting them to buy mine back. Good luck to ya. I will be watching for updates.

service program
 

I just received a service program number 08B07 that may fix this. My truck's display has never indicated when the DPF is regenerating. It is regarding a reprogram of the PCM, TCM, and the instrument cluster to to indicate when the filter regenerates and hopefully may reprogram or calibrate the engine to run right. We will see when I finally can get by without it long enough to take it in. Like the rest duplicating the problem is the hard part. I make my living in this truck and leaving it for them to drive home and back, to lunch etc for a long time is not an option for me.

HI markjc, Keep us informed of what FORD does or doesn't do with your truck ??:humm:

sorry to say but, you have an 08 and a 6.4, alot working against you, though it is a very powerful truck, it has many flaws from the dealer (i.e. the torch kit because of the super heated cleaning cycle). i also have a ford and understand how difficult it can be ( like my oil dip stick cracking off in the tube every 10k miles). the only way to get anything done with them is to bitch continually.and eventually they will just fix the problem because they know it isn't worth the fight. tell you the truth it sounds like a limp mode issue, for some reason the truck thinks it is in danger and goes in to the safe operating speed (thank you computers) and that would explain the 40 mph regardless of throttle position and the bucking is what is sending it into safety mode. it isn't your tranny cause you can drive like you stole it once the problem is cleared, so it is electrical, which means some thing is wrong with the soft wear or something electrically is jumping in the harness. thats all i can think of with it, but if you get on ford when they have your truck they tend to fix problems more permanently.

fix of the week
 

I got the reprogramming done according to 08B07. It drove fine for about 24 hours and then did the same thing over again. This time it was extremely cold, but I always keep Ford antigel and cetane additive in the tank. The engine lost power on the highway again and after milking 25 miles back to the dealership they tried to blame it on fuel gelling. I told them that I wanted the refund of the additive that doesn't work if that was the case because another guy was checking his truck in with the same symptom, but his was dieing.

Long story short after they replaced my fuel filters again (which they admitted were not gelled up) they confirmed that the fuel pump had failed and was not supplying enough pressure at highway speeds. I am currently waiting for the part to be installed tomorrow. I will update after roadtests.

HI Mark jc, So far my 2008 F-250 6.4 hasn't given me any problems, but I only have 3,909 miles, A fuel-pump shouldn't crap-out in 40,000 miles. KEEP US IN TOUCH,THANKS !!:ok1:

man I am sorry to hear your truck is acting up I hope that fixes it for you I am praying I dont have any problems with my 6.4 I have had bad luck with my other diesels

sounds like a fuel module sensor is out on it, im like the guy above me hope mine dont start acting up i got 18,600 miles on mine now and had no trouble so far...

mines the same way i have 19000 miles and so far i have had the recalls done and radiator replaced and thats it i think if i run into fuel pmp problems im going to install a fass fuelpmp in mine

Reading posts on every site, and seeing these trucks on a daily basis at work, I am beginning to notice that a LOT of these problems guys are experiencing are regional. You said your pump was garbage, and another guy had the same problem. Speaking with a technician in Florida, he told me they were having front cover/water pump problems. Up in the Northwest Territories, we saw valves sticking and destroying cylinder heads. Here in Windsor, Ontario we see a LOT of radiators leaking, but not too much else. There is the off vehicle that you get a melted EGR cooler 'cause the rad went low.

I haven't changed any fuel pumps yet - but something to look at, I guess.

At first - I definitely thought that you were experiencing a regen event - the early reflash for the regen had AWFUL driveability characteristics. Keep us posted.

Wait - what fuel pump failed, the low pressure pump or the high pressure one?

fuel pump
 

it was the low pressure lift pump. I now have put several thousand miles on the truck since it was replaced and it did fix it. Running great again. Still didn't think I should have to pay a $100 deductible though., but I guess it could have been worse.
:5:

Glad to hear your truck is running good !!!

6.4 l Powerstroke no power after recall
 

Help, I am desperate.
I have a 2008 f-350 4x4 dually. It has the 6.4l Powerstroke automatic. 12,500 miles.

I tow a 30 foot horse trailer that weighs 14,000 lbs loaded.
I have towed this trailer 8,000 miles of the total miles on it.
I tow the same load over the same road 12-15 times a year about 600 miles each round trip.
I live in Southern Oregon and there are four passes on the highway I drive that are around 6% grades for 3-5 miles.
Here is the problem, I had the truck in 3 weeks ago because the radiator started leaking and at the same time they performed the PCM reflash recall.

Drove the truck around town and it ran fine (other than the same crappy fuel mileage it has always gotten).
I had a horse show last week and hooked up my trailer and headed up the highway, 4 miles from my home while starting up this 6% grade all of a sudden from 60 mph the engine lost almost all power and slowed to 15 mph. I crawled up the mountain to get to safety and called my partner to bring another truck.
He drove the 2008 in to the dealer (it ran fine after sitting for 45 minutes waiting for the other truck) and dropped it off. When I got back a couple days later they claim they can't find anything wrong and they drove it and it runs awesome.

This never occurred before the PCM Change, Any Ideas? PLEASE HELP.

I just went to court with Ford over the exact same thing - the judge did not like it at all that as soon as they flashed it the probs started - never got any better even after 4 more flashes - waiting on the verdict now on the buy-back - it is definitely the PCM - starting to have a lot more probs with these in N TX - like bigangryhillbilly said, seems regional :humm::argh:

Just joined so I could comment. I got an 08 6.4 in the dealer shop right now. Already had the PCM reflashed about 6 months ago and no problems until now. It died on me the other day going uphill. I had 2000lb in the bed at the time. Wouldn't crank back up. By the time I backed down the hill, got another truck and unloaded so I could call for a tow, I tried one more time and it crancked back up. Drove to the dealer (2 mi) and let them have it. It cranked and ran a few more times, but they finally got it to not crank. They are replacing the fuel pump, and a leaking radiator as well. Bigblockbird, you might have them check the fuel pump. It sounds like you have the same symptoms.

I just towed my horse trailer again to see if it would repeat the no power problem.
Got up one hill o.k. and coming back over the mountain just as before all the power went away. Boost dropped to 10lbs. wouldn't rev over 2500 rpms. Nearly got ass-ended by a freight truck pulling the same hill.
Called the service manager and he says. Well we got to duplicate it to find it so now I've got to hook up my flatbed gooseneck and load it to simulate the horse trailer weight.
This is B.S. I am not making this up.
Is there really hope that a judge will make the a$$holes at ford buy this heap back?

Truck towed flawlessly until the pcm re-flash........

Ford drove my truck a total of 1000 miles and said they couldn't duplicate the problem. I paid for half the diesel until I got sick of that and made them do it. They never did say they could duplicate the problem. Looked to me like the judge is going to side with me but will have to wait to see.
When these trucks do this, it is a major safety issue and Ford can't see that. Looks like more and more people are starting to have issues with them during regen.:argh::argh::argh::argh:

now I know to keep this in mind when my truck acts up

My truck is in the shop now for nearly two weeks. I loaded the truck and trailer to 24,000 lbs. which is within the towing rating and drove it with the mechanic. It didn't lose power like it had but it threw a trouble code saying it lost fuel pressure.
The mechanic has been talking to Ford and they are basicly no help. they say they want to try to "duplicate" it. Which means they want deniability.
Mechanic is goin to try to replace some fuel pressure sensor but he is just guessing. Oh by the way they replace the raditor when they reflashed the pcm and guess what it is leaking again.
Never will I buy a Ford again. Pieces of shit.......

Newest Update.
Just picked up my truck after two weeks in the shop.
Drove it 15 miles home, hooked up my trailer and headed up the mountain on the freeway.
Got half a mile up the hill and all the power went away dropped to 16 miles an hour and stayed there over the top. Came back up the other side at 15 mph, drove on the flat road at 23 mph. Un hooked the trailer without shutting it off and empty couldn't get over 25 mph.
Cycled the key on and off and then it ran normal. Pulled it into the dealers service drive shut it off and now it won't restart again. DUH, Maybe now they can find it.

FORDS suck I'll stick with my 2004 Cummins Dodge.

Thats what you get when buying a FORD?

Well I took my truck in again and they had two codes this time. Neither one really was specific but the techs got together and really thought about it this time. They determined that individually the codes meant nothing, but together it led them to the low pressure fuel pump, or "Lift pump" mounted on the frame.
They replaced it and I have driven it up the hills and it seems to be fixed.
Funny how much more effort they put into fixing it when you point out that this is the 4th time for the same problem and it has now been in the shop for 35 days.
I do have to give the techs credit as the Ford Hotline was absolutely more worthless than tits on a boar.
It regens constantly after the reflash recall so now that it runs I am gonna
delete and tune if you know what i mean.

and kiss your warranty goodbye:c: just think of it this way though they're the only company left the rest are bankrupt

I have 5k on mine (08 6.4) had no problems, but getting ready for summer vacation and plan on a lot of road trips will let you know if I have any problems

Fix for the Power loss problem
 

I have a 08 6.4-liter Power Stroke V-8 Turbo Diesel engine and a couple months after I had it it started losing power randomly. It wouldn't go over 40 mph on a flat road or 15mph up hill if you kept your foot pedal to the floor. I had a hard time getting it to do it when I would take it to the garage and then one day it started doing it and I took it right to the garage and they diagnosed it. They found some sort of sensor or something like that that is located in behind the passenger side tire under the turbo. They changed it and it has run fine for almost a year it just started doing it again last week and the garage is replacing that part again. I hope to get it back tomorrow. I'll find out the exact name of the part.

So far 12,327 miles runs good, but why am I only getting 12.2 mpg ????

Cause its an 08 Ford! :ph:

But I only drive in the city !!! With the A/C on, & my right foot heavy on the go-fast pedal !!

Power lost on hills
 

I just joined to reply, I had the same problem with my 2008 F350 King ranch, i took it in to my dealer and they found that it was my EGT sensor, they told that there are 3 sensors in the exhaust and they just kept changing them until they had the right one, this happened to me at 40K and has been good ever since, the only problem i have now is the transmission slaming periodicly at low speeds, has anyone else had this issue? Hope this helps.

mine is a 08 6.4 25,000 miles never had any any thing go wrong yet other than bad mpg i can get 16 17 until the exhaust filter cleaning comes on the drops big time as soon as warranty is done the delete pipe is comming on

I am amazed to see that the most commonly seen truck near me is actually a dud. Can someone message me and tell me why the 6.4 in the 08 is such a miss?

I thought this was a rock solid format, based soley though off hear say that is.

-Z

6.4 08 SD Having Power Loss Issues
 

I'm having a similar problem with my truck, just hit 36000 miles on a 2300 mile trip from Utah to Quebec Canada. I hit the gas pedal to pass a car going 70 mph and the truck started to shake and lose power. I was thinking injector issues but could also we a fuel supply issue? I had both fuel filters replaced by ford just before going on the trip. Before I started having issues I was getting 16.7 mpg and then I got 12.3 mpg once I started having problems. It also seems to go through REGEN more frequently? Any suggestions? Do you think I can chance driving it back to Utah next week before I have it looked at?

i would take it to a dealer and see if there is an update or something like that they can do, i have an 08 6.4 with 56k on it and only issues have been a o-ring on the water pump and a o-ring on some senser that leaked oil... my dpf is MIA though :w2:

ford told me same thing ended up being fuel injector month later went out.

seems like the only trucks that have problems are the 08's and they're probably job 1 trucks, the later jobs like 3 have virtually no problems, remember you're buying a truck with a brand new emissions system that is kind of temperamental and not perfect and will cause problems

There was a Ford at the shop awile ago with the same problem. I didnt work on it, but it was in and outta the shop in like 10 minutes. I think it was something on the wiring harness. Sensor connection came loose or something:humm: but I'm not positive on that.