WEll, I personally have only a guess...probably a dumb one at that...but went to a couple of search engines and nothing really hit back...it sounds like maybe a sensor for fuel cut off...you know how if you hit a big bump or get into an accident with a car, you have to pop your trunk and pull the manual fuel pump override to turn your fuel pump back on? Maybe this is like a tilt sensor or something if you tip...who know, to me from what I gathered it sounds like a sensor that 'resists' fuel from traveling from your tank, to your injectors. Good luck, hope I was of some help.