Try moving it up & down with a bent coat hanger gently, when the tank is near empty, if it moves or was down with the empty tank, then you will need a new sensor, just put one in mine, real easy, take the top 1/2 of the air box off, undo the support bracket that holds the steering post to the fram, take out the 4 bolts holding the sensor in the fuel tank, and pull straight out till you get to the float turn 90degrees so it is over the secondary and wiggle the float out of the hole, O'h yea need to unplug the green wire first. Hope this helps.