6.0 running rough

[USMC-F250]

I got the 6.0 in a 2005 f250. at 55-65 mph and 1500-1700 rpm when a slight load is put on the engine such as a slight acceleration or a incline the truck starts to jerk. It seems to idle fine. with no notable problems I have ruled out the FICM, but i do have a glow plug circuit code but the reader doesn't give me any other information. I was wondering if anyone else had a similar problem or any ideas on how to fix it.

[Tuscany]

I have had the same problem with mine and so far I have replaced the hpop stand pipes dummy plugs rebuilt the turbo put a erg delete on it flushed cooling system with fleet guard restore and vc-9 replaced the oil cooler and ipr valve and changed all fluids and filters tranny fluids and filters as well I'm also battling an uphill battle with hg's and that's on the list to do next with head studs. Also tried using hot shot secret cause I though it was suffering from stiction but after 5k miles it still does it slim thinking in my case it's either hg's or injectors. Good luck on yours. If you find out what the problem is let me know please lol. Also I wasn't just throwing parts at mine hoping to solve the problem it needed all that done lol.

[Deer Creek]

I just went through this same thing. My FICM was 48v but it turned out it was the culprit! Sent it off and got it reworked and tuned and now she's running good. I beat my head against the wall trying to figuring out what it was. Ford dealer was telling me everything from injectors to head gaskets. You might want to check your FICM connectors and harness. Just my thoughts and suggestion.

[Tuscany]

Good to know i will have to get that checked out. I also checked my ficm voltage and it checked out fine. Sorry for the hijack but you wouldn't be able to tell me where to get the ficm tuned at would you? Like the 80hp hot tune for the ficm?

[cRaZy8]

I have the exact same issue.
I just installed a BPD FICM 6Phase 53v.
Didn't fix the issue.
I'm gonna try an FICM tune next.
This has been bugging me for a while.
Have since changed:

Injectors
Injector harness
Fuel pump
Ficm
Filters

I thought that I covered it, but not so lucky.
Either an Ficm tune or a new logic board?

Please post if you fix yours!

[Deer Creek]

I got mine reworked and tuned at FICM Repair.com - Your Source for FICM Repair GREAT service and had like a 2 - 3 day turn around. I got the 2 year warranty for $325 and then the PHP Eco Tune for $150 so $475 total.

[cjw0120]

i am experiencing the same problem please let me know if you solve your problem

[cRaZy8]

I just ordered an FICM tuner from IDP.

Lets keep this thread updated.

[PS/Fan]

This may sound odd but check your rear axle for play.My truck does the same thing once I'm in over drive.I put it in tow haul and it helps alot.If you do some research you will find these trucks have problems with the rear axle.I ordered a rebuild kit from timken.It was around $400 canadian.

[cRaZy8]

Rear axle play- explain a little more.

I highly doubt that axle play would only be at one set RPM and speed, only in top gear.
It FEELS a lot like a misfire (ive been wrong before!).


My FICM tuner will be here tmrw. Not sure I will be able to get it on the highway till the weekend.