Ok , new problem , when the engine is cold it runs great . However when it gets up to operating temperature huge loss in power . Transmission is downshifting but a normal hill ( unloaded ) it will drop 10 mph with pedal to the floor . Any thoughts without scanning codes ?

 

is it stock with the DPF filter on the truck? do you know if it is trying to regen all the time?

 

It is all stock , 115k , just had new radiator and thermostats put in with a refash of computer . When I first got it back from shop it when into regen 3-4 times a day , now it seems like its about once a day .

 

Also , no trouble codes showing on dash . The fuel filters have not been drained or replaced

 

You answered your next move I believe, time to replace those fuel filters, use only Ford filters, aftermarket just aren't the same.

 

No wrench light or check engine light?

Check those filters...replace them.

 

No wrench light or check engine light

 

Just drained water . Will pick up motorcraft fuel filters in morning and replace .

 

That's a step in the right direction, hopefully it takes care of some of your issues.

 

Filters didn't help , I guess it's time to hook up to computer .

 

Got two codes : one was exhaust pressure sensor "a" and the other was egr valve . My question is , Is there a possibility that one of these is causing the other ? I bought exhaust sensor but don't want to put on if egr valve is going to mess this one up . Any thoughts ? Mine is also " making oil " .

 

Can you list the exact codes? From what I've observed, when the engine is cold, the EGR is normally shut.

Have you allowed regen to finish completely?

 

I will get exact codes . When its cold it runs fine so that would reaffirm the code I got for egr . Could the exhaust pressure sensor be giving egr wrong msg ?

 

exact code numbers would help. I think the exhaust sensor would be the best start.

You also need to be monitoring your regens. Not letting them finish causing fuel in the oil.

Follow a 5K oil change schedule as well.

 

How often is it suppose to go into regen , this is my first power stroke and I have no manual , thanks