Definition: Abbreviation for Multi-port Fuel Injection, a type of fuel injection system that has one injector for each engine cylinder. Each injector sprays its fuel directly into the intake port in the cylinder head. Multi-port fuel injection is considered to be the "hot" setup because it provides better cylinder-to-cylinder fuel distribution for more power.

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There are a lot of things going on in your engine as you drive. A lot of information is taken in and processed. But how is this information gathered and what happens to it once it's collected?