Engine Position Sensor (8.3, 9 Liter) or Crankshaft Sensor (15 Liter) is failed
Mid range clutch solenoid coil or its wiring shorted to power
Temperature select pot open/shorted to power
Engine Position Sensor signal is failed (no signal at engine controller pin A9)
Mid range clutch solenoid coil or its wiring shorted to power
One sign to move on is intensive McCormick Intl 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.