So, electronic fuel injectors, allow for extremely precise control; over how much fuel, is sprayed into the cylinders.
Because, they spray, atomized fuel, directly into the manifold or combustion chamber.
So, electronic fuel injectors, are basically, an electronically controlled valve; that atomizes pressurized fuel, supplied by the fuel pump.
Subsequently, when electronic fuel injectors are energized; an electromagnet, moves a plunger, that opens the valve. As a result, allowing the pressurized fuel, to squirt out through a tiny nozzle. In addition, the nozzle, is designed, to atomize the fuel.
Types Of Electronic Fuel injection Systems Include:
- Single-Point or Throttle Body Injection
- Port or Multi-Point Fuel Injection
- Sequential Fuel Injection
- Direct Injection
When the computer cuts the circuit, that powers the electronic fuel injectors; the valve inside the injector, snaps shut and fuel stops flowing.
So, cycling the injector voltage on and off very rapidly, controls the amount of fuel delivered. Also, the longer the pulse width; the greater the volume of fuel delivered and the richer the fuel mixture. However, decreasing the duration of the injector signal pulse; reduces the volume of fuel delivered and leans out the mixture.
Dirty Fuel Injectors, Are A Common Problem.
So, a buildup of fuel varnish deposits; inside the tip of the injector spray nozzle, can restrict fuel delivery. Consequently, interfering with, the creation of a good spray pattern. As a result, this can cause a lean fuel condition and misfiring.
Warning Signs Of Failing Electronic Fuel Injectors Include:
- Rough Idle or Engine Stalls.
- Engine Vibrates.
- Engine Misfires.
- Check Engine Light Turns On.
- Fuel Leak.
- Fuel Odor.
- Engine Surge.
- Bad Fuel Economy.
- Failed Emissions Test.
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