Electronic Fuel Injection 101

Electronic fuel injection has been the basic standard for most automotive engines since the mid-1980s and is a source of confusion for many do-it-yourself mechanics due to the perceived complexity of the system. Once you have a core understanding of how fuel injection works, however, it becomes much easier to diagnose and repair problems it may have.

The basics are pretty straight forward: fuel and air are mixed and injected into the cylinder for combustion. There are three basic types of fuel injection: throttle body, multiport, and GDI.

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