When to worry about engine noises?

j par said

I solved my friend's oil problem today. Low oil pressure it would drop to nothing and bounce back up do all kinds of weird stuff. Brand new Dakota digital gauges and sensors.
I gave him a brand new mechanical gauge I had and helped him install it... His oil pressure is perfectly fine...
I would call blueprint and do as told ..

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A mechanical guage confirms the oil pressure is good. The Dakota Digital guage drops to nothing and then comes back. I would suggest that probably the pressure sender is kapput. Determine the ohms range of the Dakota sender and procure one from a parts store. Also probably a good idea to check the wiring for broken or poor terminal crimp or grounded.
By the description of erratic reading, I doubt the engine or the instruments have an issue.