Oil pressure goes to zero

[Conflict]

New oil pump and sender. All was well for a while then a couple miles from home it drops to zero then starts knocking. Comes back up stops knocking then goes to zero again and starts knocking again. Made it home. New pump was a year ago but I hardly ever drive the truck. Maybe 100 miles in that year. What could cause the drop then come back up then drop again?

 

[Tank Guy]

The lack of responses here is a pretty good indication of how unusual your oil pressure problem is. Every possible explanation I can think of seems far fetched to me, but is it possible the oil pick up tube that carries oil from the sump to the pump is loose, causing the pump to loose its prime? Beyond that I’ve got nothing. Please let us know what you found once you get it sorted out.