With mine, I'm just watching it as I think it is temp related (getting warm in south FL). The metal shavings is something I read a couple times and sounds like it doesn't pertain to your situation. How rough is the idle, like rattle your teeth or make the side view mirrors a little blurry?

These pumps seem very temperamental!!!

This is just a guess, I think it could be your CSS Cam Shaft Senor.

https://www.dieselbombers.com/24-val...r-problem.html

Change your fuel filters... I still think the apps is bad, from my experience...

cam shaft sensors are only on auto trucks correct? it shakes side view mirrors but not real bad.

No they are on manuals as well.

well just thought id let yall know that my problem was a injector misfire. upgraded to rv275s this weekend and the problem went away