What is the sensor on the block just above and ahead of the starter? Whatever it is, on mine it has power going to it. My truck has just started missing under load and occasionally cutting out on me. Oddly enough this happens just after a right turn 90% of the time. The reason I know that my sensor has power to it is that I heard it shorting a bit when I went to check my plugs. Somehow this must be interfering with my ignition. I will replace the bad wire but I still don't know what kind of sensor this is or why its affecting my ignition. Any ideas?