I was doing my oil change this morning (man am I glad i dont have an 8th gen, this ones bad enough) and I'm finally getting the filter out when I notice this plug dangling above. (see picture) I checked out my Haynes manual and had no luck finding it. No pics of it on Advance Auto's/Auto Zone's site. It comes off of the harness that runs behind the intake manifold from the firewall near the brake booster. I cant find anything thats missing a plug. When I replaced the original motor with a OBD1 JDM B16A I didnt retain the Crank Fluctuation Sensor could this be what it was originally ran to?