BVK,
What I think you are trying to get at, is that oil pressure affects fueling.
The only way it would is to have a low pressure syndrome, and then you would have a check engine light, or even too high of a pressure also throws check engine light.
On a Ford, oil pressure does or can have an effect on fueling.
I know some modified Ford P-strokes have "messed" with oil pressure sensing.
On a Cummins the injection system is different, it is not oil pressure or HEUI injected.
It is a Bosch Common Rail fueling system having nothing to do with Oil pressure.
--Justin