Hello, ive been searching but really need to know if what i think it might be applys to my situation. First off i got a 01 F350 7.3L stock except for kwik filter mod if that matters. I got an oil change a couple days ago and after i noticed a slight miss, or vibration at idle. Idle seems kinda funny too. Guy in my shop did the oil change, checked over everything oil is good, connections seem fine. I thought maybe it was air in the system or something, but its still doing it.

The other day i started it up, was fine... go to drive through and it started doing it, then took off and sitting at a stop light it was fine..... Seems to do it intermittently. Got the test done with a ford scanner at work, it passed and threw a code P0476 but my CEL is not on. I have cleaned the EBPV tube and sensor a couple months ago. The vibration is not bad but i notice its there and its not normal, also it seems performance is lacking a little and it sounds kinda sick. Was thinking it was the UVC harnesses coming loose but which one do i check? Both? Any help would be appreciated, i gotta tow my toyhauler this weekend would like it fixed before then. Thank you.

 

What kind of oil did you put in?
The Powerstrokes are VERY picky about oil because the injectors are driven by high pressure oil and if something is not right, it will manifest itself as a driveability concern.

 

if you intermittent miss seems like that of a fouled plug on a gasser, you are not alone. Quite a few people here (including myself) have been plagued by this. Have you changed your fuel filter lately? The only time I would notice a lack in performance was when the filter was getting dirty (reason i did the hutch).

I must say, though, since running some 2 cycle it has completely disappeared on mine. Not even DK got rid of it. I am not saying the 2 cycle got rid of it, but mine has not done it since.

 

I put 15w40 motocraft in it. I got some crc diesel fuel injector cleaner additive, added a bit and it "seems" to be less of vibration, but i can still tell its there. Fuel filter was changed about a couple months ago also, i was gonna check it but it was just a couple months ago, maybe some gunk got loose.