PLEASE help me! VNL670 with an ISX CM2350 4.4 MPG!

[VNL670]

(07-06-2018 )smorgan87 Wrote:  That oil coming out an injector would have me real nervous. I might would wanna run a compression test.

It was actually an O'ring that goes around the fuel quail (I think that's what they are called).

[ammjay61]

So, did this story end up having a happy ending? Were the overhead settings the culprit, did your mileage come up?
Sometimes these threads are like books from the library where someone the out the last two or three pages.
Hope you ended up deciding what the issue was.