hi guys car came in for oil light beeping intermittently like once every 30 miles. put oil gauge after warming up at 2000 rpm we have about 60 psi. at idle we have 20 psi. the weird thing is the needle vibrates very bad at both readings. we recommended to customer to pull pan off and inspect, we found screen plugged about 20 o 25%. we put a new oil pump and screen. the readings about the same, customer picked up the car and three days later the light came back on for 5 seconds after a 30 min drive. we have also replaced the oil sender. I'm concerned about the vibration,any suggestion