Found some pipe insulation in the nosecone of my 16 RMK last ride and noticed the aluminum heat shield splitting on the pinch seam right up where the pipe bends in the front. Also had an intermittent DET code and also a one time TPS code putting the sled into limp mode. Would the rattling shield be enough to trip the knock sensor? Plugs looked good, changed the EV relay just cause I had a spare, and filled up at a diff gas station in Valemount with 94 Petro Can and never had the code the next day, but the riding was way easier. Motor was rebuild top to bottom 600km ago, and has never thrown a code before.