I have an F450 with a 6.0 turbo diesel with 267000 miles std trans. 4wd and just bought it a few weeks ago.
When the engine is cold, the truck runs fine but after driving for 15 minutes, I loose power in 3rd, 4th, and 5th gear. The gauge for the turbo drops from 20 down to 5 and the truck starts blowing black smoke. This starts at 1500 rpms and stops when I am past 2200 rpms. Before 1600 rpms and after 2200 rpms, the truck has lots of power but withing those ranges, the truck has almost no power at all. When I first got the truck, the problem didn't start until I was up to 1800 rpms.
No codes showing up either. I had the truck serviced by a diesel mechanic and the filters replaced using Ford parts. Problem persists and only exists when the engine is warm.
If it helps, I live in Beaufort, SC.

Any suggestions?


Larry

 

Have any gauges to see live data Larry? Like a scan gauge or Torque Pro? That info would be very useful to determine what exactly is happening, you don't need a guess as to what's the issue and no need to throw $$$ at it.

 

I do not have either tool. All I have is a code reader that I borrowed from my dad. This is my first diesel and I have no desire to just throw parts or money at it which is why I posted here. I have worked on gas cars all my life but I am unsure how much of that knowledge can be used on a diesel.
There is a gauge on the dash that shows the turbo psi which is where I got the reading from.

Sorry, I was wrong on the code reader. It was my car I was fixing when I used the reader, not my truck.

Big difference, I know but when I get migraines, I mix facts up sometimes.
Sorry for the mis-information.

A diesel mechanic used his laptop looking reader on the truck and found no codes.

 

Gas engine mechanic skills are a good start. I had similar problems when my exhaust back pressure sensor went bad.

 

It's hard to know much without a diagnostic device of some kind but you could pull the intake tube off the turbo (driver side) and check the compressor wheel for binding/rubbing in the turbo housing. There can be some side play (up and down) but very little and and there's a little more room for end play (in and out).

 

Start here with some reading on a monitor type that suits your needs and then go get it... so we can get started on your truck. If you choose the Scan Gauge (and most do), get one from Advance Auto and use code TRT30 to save 30%. Or the Torque app is the cheapest and better than Scan Gauge, you'll just have to wait on shipping.

https://www.ford-trucks.com/forums/1...eral-info.html

 

How's your oil cooler? If the oil temp gets close to 300 degrees, it starts to derate power.

 

You need digital oil and coolamt temps, and you need to measure EGR, check for all codes. Is EGR intact, is it plugged in, just because it doesn't throw an engine light could be codes set. My hope is EGR, but they are right, defuel at 230 coolamt and about 250 oil temps. Is your fan running when ECT is over 218 f?

 

Being that it's an 05+ I'm surprised it didn't throw a check engine light or a wrench light.

I would do as Rusty stated above, check the turbo.

Not sure if I would trust the scanner your dad has for scanning for codes, it may not be picking up Fords codes. A lot of them don't.

 

I am currently looking into getting one of the scanners as suggested above. I will post again when I have more information. The gauges on the dash have needles and no numbers so I do not know the temps or any specific readings.

 

And the dash gauges don't really read anything.

 

Fuel level, boost and speed are good. BUT speed will be off if
you changed the tire size from stock.


Sean

 

Ok, I purchased and received the OBD II diag Interface and downloaded an app called "car gauge pro" onto my droid turbo.
I tried running the scan for ford and it quit saying I needed the obdlink mx installed and I do not see one on play store.
I did try the gauges on the car gauge pro app but there are many to choose from and I do not know the names of all these things it lists so I do not know what gauges to put on the phone.
I did end up taking my truck back to a shop where the tech looked at it and found a sensor out of wack and changed it but the problem still exists. I got my truck back at no charge. I was also told that the intake and turbo needs replaced to fix the problem. From what he says, the turbo, at 1500 rpm's - 2200 rpm's in 3rd 4th and 5th gear, starts throwing too much air and opens some valve which in turn shuts down the turbo.
I do not know diesel and do not understand this but this is the info I have found and what I was told.
The tech said a friend of his had a truck doing the same thing that mine is and when he changed the intake and turbo the problem went away.
I cannot afford to put it back in the shop so I am driving it as is. I will try to find a service manual for the truck so I can at least see what I am doing on the truck.

Any advice or extra comments?


Larry

 

WTF Replace the intake.
More you should find a new shop. It sounds like this guy is trying
to baffle you with bull****. That or he is smoking some very good stuff
and wants your $ to pay for more of it.

There are no sensors on the turbo. On the intake is a MAP port and a IA2
MAP = Manifold Air Pressure, IA2 = Intake Air (temp)2.

EDIT :
Two things that may be worth trying. Remove the MAP nipple and line
and see if it clear or plugged up. Same for the EBP sensor. once they
are know to be clean then you can go on to other things. BTW be careful
with the plastic nipples. They get brittle and break.

Did you do what Rusty said to do and if so what did you find?

I sense starting from a blank point I would start with base oil pressure.
Do not use the dash gauge set it's useless. Get the Torque app or go get
something like the Scanguage 2 both are easy to use and everyone knows
what they are looking at when it comes to the numbers.

You need to know what the MAP,EBP,EOT,ECT are reading to start with when it's
warmed up and acting up on you.

Without that info there is not a lot anyone can do other than guess and cost money
by throwing parts at it.


Sean

 

Guys,

I don't know what all these abbreviations stand for so I am having a difficult time following your instructions or finding these parts on my truck.
I have found and ordered service manuals for my truck so I can get a better understanding of what you are saying. I have googled these abbreviations and some are coming up blank and youtube isn't much better.

I should get these manuals in around Wednesday 7/08/2015. I appreciate all this advise but you may as well be speaking greek or mandarin as I have no clue what you mean.

I find, even in my line of work, I use abbreviations and terminologies without thinking as it is what I know and I have to back up and explain to my customers what I mean. I still get a blank look at times. Now I know what they must feel like when i talk to them.

I think I found the turbo but the pictures I find online shows the turbo but not on a truck like mine so I am not certain. I don't mind tearing things apart or delving into new things but without a bit of understanding as to what does what and what not to mess with, I am cautious. I don't need to break something by accident because I grab, twist or try to disconnect the wrong thing. Perhaps even this statement shows my ignorance when it comes to diesels.

Please be patient, I will get busy as soon as I get these books and thanks for your time.


Larry