Hello I am new hopefully all the experience here can help me out. My 04 f-250 6.0 is running rough when Idling and died after 15 minutes of driving. I had to wait about 10 minutes before it will start. I had a p0266 code and changed the number 2 injector now I have a P0284 for the number 8. The engine has 26,000 miles on it since the factory service warranty work in which they changed the no. 7 injector and the turbo and all the gaskets and such. the Ficm has 47.6-48 volts. the ICP looks good and passed the air pressure test. New fuel filters, New oil filters and rotela 15-40 with wix filter. Batteries are good and fuel is good. The EGR is also good on it and the EGR cooler is also good. Fuel pressure is good and oil pressure is good. Truck has some power when it is cold but still rough idle but when it warms up it looses power to the point where I can mash the peddle and it takes about 100 feet just to get to 5 mph. I am lost for words, what else it could be.

 

I know you said your fuel pressure is good but How's your lift pump pressure .

 

Does your boost pressure build up at all? What is your fuel pressure reading and where are you reading it from? You could try running some revx through your system.

 

Also get rid of wix filter. they're no good on 6.0 from what i found out on here they can starve the engine of oil. run fram or motorcraft. frame is a lot cheaper from walmart

 

I'd almost be willing to bet a factory Ford or motorcraft oil filter fixes most of your issues, DO NOT USE those aftermarket oil filters, ESPECIALLY one's that have their own caps.

99stacked, the Fram is only $1 cheaper than the motorcrafts at wal-mart. Just FYI. I've since heard the motorcrafts have been updated and are different than the old style frams, spend the extra $1 and get the MC.

 

Ooo so the prices have changed on me. last i checked around here frame was cheaper by alot Im gonna start getting motorcraft from now on. thanks mdub

 

Well... that's what the prices have ALWAYS been for me... maybe you're seeing the new design oil filters already and they've gone up in price? Or have they been a big difference for a while? I believe last I looked at Wal-mart, which has been a while (whole other topic, but I've taken a vow to not step foot back in Wal-mart), the MC was exactly $1 more than the Fram, I think the Fram was $17 something and the MC was $18 something.