If you find a non OEM crank sensor that works great let us know. The 6.5 is notorious for causing all kinds of problems with the off brand sensors. Evidently the 6.5 ECM has trouble recognizing the signal and creates havoc No one here has used an oscilloscope to verify what is going on with these sensors. I suspect some evil conspiracy in the part but I don't have the time to investigate the problem. I may have been the one here that discovered this issue years ago...