Oil pressure problem
05 having oil pressure problem. Usually runs around 50Lbs cold 15 warmed up. After the engine warms up, and I come to a stop-First the check guage's warning light/bell go's off, then approx. 2 seconds later the oil pressure guage plummets from 15Lbs to zero. A very slight increase in RPM from idle bring's the guage rapidly back to 15Lbs. I have checked oil level repeatedly, and changed filter(after recent oil/filter change). I don't want to replace the oil pressure sender without more input. Thank you for any help you can give.