Hi i have asked this question before or similar. i put a 1993 motor in my 1992 crown vic. the original burned to much oil. so now i have a 1993 motor in my 1992 crown vic.when the 93 motor was first started i had no pressure in the oil gauge in the instrument cluster. it read zero.so after putting a brand new oil pressure sensor in close to the oil filter it started working. but after driving it for a few days the oil pressure gauge was all over the place. never a steady pressure. so i put another sensor in. now the gauge is telling me the oil pressure is always why to high. the needle go from 12 oclock to 6 oclock. with the second sensor it reads 1 oclock or 12 oclock. way to high. from what the old motor ran. now i did have a pressure test on the oil.it was running at 32lbs in idol. 40-50 at 1500 rpm.but the gauge the mechanic had was aratic it didnt want to stay in one place at 1500 rpm. but it was close to 40-50 pressure.so what i am thinking is .the oil sensor beside the oil filter is not a ford sensor. i think maybe this might be the problem.do you know if the motor is sencative to non ford parts? i have a ford sensor on order. if this new ford sensor does not work. what do you think the problem is? oil pump?