I have a 2000 7.3 I've done just about everything I can think of put injectors in it wiring harnesses valve cover gasket to the wiring harness exhaust back pressure sensor pcm and still idles rough check engine light still comes on intermittently current code showing are po381 po603 p1316 po478 p1282 haven't had the truck long the previous owner butchered some of the wiring I think I fixed it all not sure not sure that current computer and it's in good condition it has cutouts and can't afford to put much more money into it please help

 

Hopefully one of the mods will see your post and move it to the 7.3 forum for you. I'm sure some of the smart folks there can give you some advice. Good luck!

 

Update took the valve covers off tested all the wiring tested the injectors all seems good except in the morning first start and after it sits awhile and cools off first start almost like a dead skip in multiple cylinders and then after you Goose it a little bit of black smoke out the tailpipe and just runs a little bit rough

 

Rough idle almost like a dead skip in the morning to give it some juice and it Smooths out a little bit but still idles rough blows white smoke out the back replace the injectors still not sure what's going on wasn't idling this hard prior to me replacing the injectors all the injectors test okay