I have a 2005 F250 automatic, 6.0, with 139,000 miles on it. Done some upgrades this spring to the engine.
Replaced the oil cooler, EGR cooler,STC fitting, oil tubes for the turbo, water filtration system. Ran fine until about month and a half ago starts great. If I don't let the engine get to operating temp it spits and sputters and (jerks once in a while), when you pull out and give it fuel. But when you give more fuel it will smooth out for the most part. Even at 65 if you just crack the fuel you can still fill a little roughness. Changed fuel filters, fuel, seafoam, water remover, and one have any suggestions? No codes, no check engine lights.

 

Injectors? FICM voltage? Check Odometer trick, youll probly find a code. Clean EGR? Does it feel like the tranny? more info

 

A Gauge setup will pay for itself here

I use a ScanGaugeII

there are other gauges that work great to but better post what one your getting as some gauges wont do what you need it to

Check FICM--Batterys--Alternator to start with

 

No I don't think it's the tranny. But I will check the FICM, batteries, starter, alternator tomorrow. Thanks

 

Pretty sure the key trick does not work on these fords.

Scan gauge II will be your best friend.

 

What oil are you running in the ole girl? I switched from 15W-40 to rotella T-6 5W-40 and it smoothed her right out.

 

Well if its a Female Truck theres the Problem LOL

she will smooth out in 7 days or so

 

LOL you got me on that one

 

I've used Rotella 15W-40 every since I got the truck. Not knowing what the previous 2 owners used.

 

Finally got it scanned, #3 injector is going bad. Nothing else showed up.