I have a 2005 F250 6.0 automatic, 215,000 miles on it thought my wife may have gotten bad fuel. Changed fuel filters, runs betterish. Flat ground no real problems, go up hills power starts to drop struggles some and turbo pressure per gauge drops ( per my wife) she has driven it the last week. Has not tripped any codes, I have no scanner to dwell deeper.

Any suggestions?

 

It's hard to say without having some data from several sensors. Could be low boost..low oil psi from HPOP or a number of things. You could state your location and maybe someone here is local and might be able to read the live data to help figure it out. Eventually you'll need to get something to read live data if you plan on diagnosing it in the future yourself.

 

Kingsport Tennessee

All I could think of was dirty fuel. Done the same thing a couple months ago.

 

How do you know there are no codes if you don’t have a scanner to find them??

 

Unless you have something to scan with, as MP mentions, you really don't know if it's tripped any codes. Not everything sets the CEL.

At the very least, you can download Forscan to a laptop for free and get something like this.
https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1


Or, for a few bucks, get it on your smartphone.

For starters, has the truck ever had the blue spring update done?

 

Yes, I done the blue spring a couple of months ago. Ran better than it ever had. MPG improved, power, response.

 

As others have mentioned you're going to need something to see engine parameters and if possible read the Ford codes that haven't tripped a CEL. Think of these diesels like OBD1 or early OBD2 cars where unless an actual emissions component fails or the stars align a CEL will actually be set.

Forscan with an ELM327 bluetooth or usb to OBD2 adapter would be great, if you have to order the ELM327 go to Autozone or similar and get a Scangauge2 and program it with xcodes listed in the tech sticky.

With a scanner monitoring parameters, first check voltage it should be 12.5+ without the truck running key off. Key on it running it should be 13.8-14. It shouldn't dip much below 10.7 when starting otherwise you have bad batteries. Bad batteries can lead to a bad alternator and can cause the FICM to go out which causes injectors to fail.

Next is to look at FICM voltage it should be around 48 volts key on and key on running at all times. If it drops below 45 the FICM needs to be replaced and batteries and alternator should be checked.

For your current problem once the basics above are checked, you'll want to look at IPR and ICP. Look at the tech sticky for acceptable ranges. If all those pass, the issue then is somewhere in the EGR (including oil/egr coolers) and/or turbo systems. Of course to be 100% sure, I'd hook up a manual fuel pressure gauge and verify fuel pressure is 100% not the cause.

 

I have never heard of the blue spring update, could someone enlighten me. I have a 2003 6.0l F350. Thanks

 

Fairly easy, must do mod for the upper fuel bowl that will increase the fuel pressure up around the 60 psi range.......long story short your injectors will thank you.

Ford part# 3C3Z-9T517-AG

 

Thanks Mike I will check with the dealers with that part number. Darrell

 

If your symptoms seem like you got bad fuel it may be a good idea to pull the hfcm module from the drivers frame rail and clean out any diesel fallout that may be in there. I had similar issues and it progressed to leaving me stranded. Turned out there was wax built up in there that would block off the fuel line going to the upper filter housing thus choking off the engine. If you search for it I posted some pics a while back.