Alright, is there a way to check if the sensor is good without having to throw a new one in? I wasn't able to locate the output speed sensor. I about the same as the input, just further back. As for the plug... are you talking spark plug? I wouldn't think they would be connected like that. So far, I have replaced the input speed sensor, traced all the wiring involved (there are no loose wires or corroded connections), and checked and double checked every fuse I have.