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Home >> Buick >> 1984 >> Regal Base, 4D Sedan, 4.1 4 >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - Multi-Point >> Operation >> Fuel System >> Fuel Injectors

Fuel Injectors

Fuel injectors are solenoid operated pintle valves and are controlled by the ECM. The ECM turns on the solenoid, allowing fuel to be injected in a conical pattern at the opening of the intake valve. Fuel not used by injectors passes through the pressure regulator and is returned to the fuel tank.