been messin with this for a while i changed the injectors (had 4 bad) now has amazing power but has miss at idle. sounds like fuel knock. but not as bad. and goes away once under power. did cyl cont test and read nothing several times. one of the times got it to say #7 so i replaced the injector and the same. no change any ideas want this fixed

 

Where'd you get the injectors from?

 

diesel fuel injection a local fuel shop

 

Are they reputable? I'll ask my dad, he's been working on powerstrokes since they very first came out