But here's what happened. This morning I go out to start the z and let it warm up and the smell of fuel was extremely bad. Pop the hood to find a small fuel line leak just under the balance tube spraying a small amount all over the one injector connector and this sensor. I tightened the clamp problem solved. However while tightening clamp I noticed this sensor had fuel on it and the black wire (im assuming ground) was broken. I believe this sensor is the detonation sensor connector but im FAR from an expert so that's a mild guess. Its dead center in the back. I'm sorry about the poor explanation I'll surely try and post a pic