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injector FAQ

FAQ: What is a fuel injector? How do you clean fuel injectors?

ERIKC Answer: Simply put a fuel injector is an electronically controlled valve that is either fully open or fully closed. The period the valve is fully open is measured in millionths of a second.

Injectors have the finest tolerances of any mechanical part of the engine.

FAQ: How Does a fuel injector work?

ERIKC Answer: Fuel under pressure is sprayed in a very fine mist from the tip of the injector. To achieve this, a current must flow through the injector. Contrary to popular belief, this is NOT done by sending power to the injector. Fuel injectors are normally fed power whenever the ignition key is on, but the circuit is not completed and therefore the injector is still closed. The computer controls the ground side, of the circuit. When the computer provides the ERIKC injector with a ground, the circuit is completed and current is allowed to flow through the injector. This energizes an electromagnetic coil inside the injector, which pulls a sealing mechanism such as a pintle, ball, or disc away from its seat. This makes it possible for fuel to flow through the injector and into the engine. When the computer removes the electrical ground to the injector, the electromagnetic coil becomes demagnetized and a spring forces the pintle, ball, or disc shut to cut off fuel flow.