Question about Ford F-150
Without knowing the model car your working on I'll assume it's a standard Ford car fuel injection system. The injectors each have two wires going to them. All of the injectors are powered through a common wire. What make them work is the processor (computer). When the processor determines that it's time to open an injector, it grounds the wire coming from the injector. The processor uses a duty cycle to allow the injector to be on for a certain amount of time.
The processor determines when the injector should be turned on by using signal inputs from sensors. Oxygen sensors in the exhaust tell the processor if the air/fuel mixture is correct or whether it needs to add fuel or take away fuel. The fuel is pressurized by the fuel pump and typically measures 40-65 psi, depending on the vehicle. This high pressure fuel goes through the injestor and is atomized when it goes through the 3-4 small holes in the injector. The atomized fuel mixes with air and enters the combustion chamber to be compressed and burned to make power.
Posted on Apr 07, 2011
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Posted on Jan 02, 2017
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