I just did a search for crankcase fluctuation sensor over on Honda-Tech for ya but come up empty. By the sounds of the sensor sounds like it would indeed make your car run like crap. Take a mulitmeter to the wires running to it and check to make sure you have power going to it. If there's power going to it try replacing it. I dunno...I'm obdo....I'm just trying to use basic common knowledge. Let us know how it works out.