Section 03-14: Engine Controls, Electronic | 1996 F-150, F-250, F-350, F-Super Duty Series and Bronco Vehicles Workshop Manual |
Diesel Engine
The injection pressure regulator (IPR) is a variable-position valve that controls injection control pressure. Battery voltage is supplied to the injection pressure regulator when the ignition switch is in the ON position. Valve position is controlled by switching the output signal circuit to ground inside the powertrain control module (PCM) (12A650). Injection pressure is controlled by the powertrain control module based on inputs from intake air temperature, engine oil temperature, manifold and barometric pressure, and pedal position.