Good news is that the spec on the oil pressure sender going to ground is 5.6-8 psi, so your 14 psi at idle is fine.

I think a new sensor might do the trick

Put the black (-) lead on the battery post (-) and leave it there as you take three measurements with the read lead ( + ) by moving the red lead only. 1. Across battery. 2. ( + ) On the passenger side connector. 3. ( - ) On the passenger side connector. 4. How move the black lead and take the same r...