I´ve The Same Problem, Changed Both Sensors, Checked Oil Pressure With 2 Gauges, It Drops To Less Than 5 Psi When Engine's Hot But If Accel Pressure Goes To 60-80 Psi, Changed Oil Pump Three Times And Problem Still Persist, Once Engine Is Hot Alarm Buzz Above 2250 Rpm And Mutes At 3000 Rpm Aprox..