[vegaman04]

Pump Mounted Driver aka Fuel Solenoid driver, its located on the injection pump and it controls the amount of fuel. Its a common issue on these motors. Heat is the main cause of failure. Ebay has relocation kits, as well as other suppliers. Best place to move it out of the engine bay. Heath Diesel has a nice kit but with a price but comes with a great warranty and service. Do a search on here and look around and you'll find some more info.