Will diffrent oil pressure switches give diffrent readings? Depending on size ? The smaller one states it's for 2.0 2.4 and 2.6 and the Bigger one states it's for 2.4 2.6 3.0? I changed mine to the bigger one when I changed to the tachometer cluster.I have low oil pressure readings but I can tell I'm getting plenty of oil through the block and head?