I have a 94 v6 3.4. When my car is in gear with warm motor my pressure is 0. its on the red line. When cold the pressure is 60p.s.i.. The motor doesnt leak or use any oil. Also the motor is quiet. Could the senser unit be faulty? If so could this be the reason Im having pressure problems? Or could it have something to do with my oil pan or filters? Help!!! Im running out of ideas. DEE{misspiggy}

 

Check your previous thread, I posted a helpful and cheap test you need to try.

 

You need to verify that your pressure gauge is accurate before going off in tangents. Get a mechanical oil pressure gauge, remove the oil pressure sender and screw the mechanical gauge in its place, run the engine & check the oil pressure. If the pressure is still bad you have major problems (per the FSM you need a minimum of 5 PSI at idle & engine warm). If pressure is good, then the pressure sender or oil pressure gauge on the car is bad.