I have a 1997 Chevy Camaro with a 3.8L

Problem:

Oil pressure on cluster goes pass 120 psi (hits the bottom of cluster) and the A/c shuts off but sometimes it will go back to 60-80 psi and A/c comes back on.


Replaced:

Oil pressure sensor
Cluster
and tested oil pressure and came out normal

have no clue what to do next can someone give me a ideal?