I reviewed this fellows chat and leads me to think the gauge is faulty.
https://www.impactbumpers.com/forum/index.php?/topic/37201-oil-pressure-gauge/
I'll try reading the ohms in the red/green wire at the gauge to see if it is in the 9 to 169 range. I did not see any erratic changes just went pegged. I'll check it tonight. Thanks!