Rough Idle and driving

[Raisin Kane]

Hello,
I've had my powerstroke for 3 years and have replaced EGR cooler(put in delete kit), head gaskets, FICM, oil cooler, radiator, and high pressure oil pump. It is a 2004 F-250 6.0 Crew Cab. For the longest time and it happens randomly my truck allowing it to idle for a while( doesn't matter if its hot or cold) will idle really rough and shake the truck. I can try to take off and it will barely go until I get enough boost from the turbo. After I accerate to the speed limit or a little higher it will clear up and run fine. Also keep in mind there is no smoke when it happens that I can see. And then other days it runs 100% fine with no problems. Any ideas? I thinking injector but I'm not sure. Thanks for any advice.

[TerraScaper]

Sounds like it might be the oil you are running, synthetic? might be stiction, do a search on REV-X.

Try plugging the block heater in and see if that helps.

Check FICM voltage when the truck is cold in the morning, KOEO, cranking and engine running.