What triggers the injectors to fire on a 1996 ford f 350 460 efi?

In a 1996 Ford F-350 with a 460 EFI engine, the injectors are triggered by the Powertrain Control Module (PCM). The PCM receives signals from various sensors throughout the engine and uses this information to determine when and for how long to activate each injector. These signals are ultimately translated into electrical pulses that energize the injectors, allowing fuel to be sprayed into the combustion chamber.

Key sensors influencing injector firing include:

* Crankshaft Position Sensor (CKP): Provides the PCM with information about engine speed and crankshaft position, crucial for precise timing of injection.

* Throttle Position Sensor (TPS): Indicates throttle opening, allowing the PCM to adjust fuel delivery based on engine load.

* Manifold Absolute Pressure (MAP) Sensor: Measures intake manifold pressure, providing another indicator of engine load.

* Air Temperature Sensor (IAT): Helps the PCM compensate for changes in air density due to temperature variations.

* Oxygen Sensor(s): (if applicable - some older systems didn't use this extensively) Monitors exhaust gas oxygen content to allow for closed-loop fuel control and fine-tuning of the air/fuel mixture.

Essentially, the PCM integrates the signals from these sensors and uses a pre-programmed fuel map (stored in its memory) to calculate the ideal amount of fuel needed at any given moment. It then sends the corresponding electrical signals to the injectors to deliver that precise amount of fuel.