Water in Fuel sensor indicates the water in the fuel filter needs to be drained.
Water in Fuel sensor (optional) indicates the water in the fuel filter needs to be drained.
One sign to move on is intensive Allis Chalmers engine work, such as needing new pistons and injectors. If you hear loud clunking sounds from the engine, it could be due to the starter hitting the flywheel or a piston piercing the engine block, which can indicate a seized engine. Farmers encountering these problems have coined the saying: If your engine is knockin you better be shoppin.