Oil and Excess Pressure in fuel

[HAULNTX]

Update: I replaced the brand new OEM Cummins crank position sensor with another brand new OEM Cummins sensor and that fix that issue thankfully.

This is a gravel hauler for context. Everything was looking good and sounding good at idle. On its first break in trip I’m trying to get a small load on me, but I noticed once on the road when I get to a stop light at idle the pressure drops to 15psi. Driving at 1400-1500 rpm it is at 35 psi, and at 1700 RPM it will hang at 40psi. The low pressure scares me enough though to pull the truck over. Am I missing something?

Visually everything looks good other than that. Truck sounds good but any ideas why it would be at 15psi at idle?

I followed manual to shim it and put the dimes to get the pressure up a bit and running down the road it has good psi, but at idle that’s what’s bothering me.