Method and system for fuel injector balancing

An engine system, comprising:

• an engine having multiple engine cylinders, each with a corresponding direct fuel injector;
• a fuel system including a lift pump and a cam actuated high pressure fuel pump for pressurizing a direct injection fuel rail;
• a pressure sensor coupled to the direct injection fuel rail;
• and
• a controller with computer-readable instructions stored on non-transitory memory that when executed cause the controller to:
• while the cam actuated high pressure fuel pump is enabled,
• average fuel rail pressure sampled over a quiet period of a first fuel injector;
• predict one or more pressure altering engine events occurring between the quiet period and a future scheduled injection event at a second fuel injector;
• update the average fuel rail pressure based on pressure changes associated with each of the predicted one or more pressure altering events;
• and
• command a pulse-width to the second fuel injector at the future scheduled injection event as a function of the average fuel rail pressure.